#pragma GCC optimize("O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
#pragma GCC optimize("unroll-loops")  
 
#include<bits/stdc++.h>

using namespace std;

using ll = long long;
using ld = long double;
using db = double; 
using str = string; 
 
using pi = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<double,double>;
 
using vi = vector<int>;
using vb = vector<bool>;
using vl = vector<ll>;
using vd = vector<double>; 
using vs = vector<string>;
using vpi = vector<pi>;
using vpl = vector<pl>; 
using vpd = vector<pd>;

#define tcT template<class T
#define tcTUU tcT, class ...U
#define tcTU tcT, class U
#define tcTU3 tcTU, class C
#define tcTU4 tcTU3, class D

#define ts to_string
#define rsz resize 
#define ins insert 
#define all(x) (x).begin(), (x).end()
#define sz(v) ((int)(v).size())
#define rall(x) (x).rbegin(), (x).rend()
#define pb push_back 
#define mt make_tuple 
#define eb emplace_back
#define mp make_pair
#define lb lower_bound 
#define ub upper_bound 
#define fe first
#define se second
#define bs binary_search
#define ft front()
#define bk back()

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)


const int di[4]={-1, 0, 1, 0}, dj[4]={0, 1, 0, -1};
const int di8[8]={-1, -1, 0, 1, 1, 1, 0, -1}, dj8[8]={0, 1, 1, 1, 0, -1, -1, -1};
const ld PI = acos((ld)-1);
const ll INF = 1e18;
const double eps=1e-11;//NOTES:eps

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll randint(ll a, ll b) { return uniform_int_distribution<ll>(a, b)(rng);}

using ul = unsigned long long;
ul modMul(ul a, ul b, const ul mod) {
	ll ret = a*b-mod*(ul)((ld)a*b/mod);
	return ret+((ret<0)-(ret>=(ll)mod))*mod; }
ul modPow(ul a, ul b, const ul mod) {
	if (b == 0) return 1;
	ul res = modPow(a,b/2,mod); res = modMul(res,res,mod);
	return b&1 ? modMul(res,a,mod) : res;
}
bool prime(ul n) { // not ll!
	if (n < 2 || n % 6 % 4 != 1) return n-2 < 2;
	ul A[] = {2, 325, 9375, 28178, 450775, 9780504, 1795265022},
	    s = __builtin_ctzll(n-1), d = n>>s;
	trav(a,A) {   // ^ count trailing zeroes
		ul p = modPow(a,d,n), i = s;
		while (p != 1 && p != n-1 && a%n && i--) p = modMul(p,p,n);
		if (p != n-1 && i != s) return 0;
	}
	return 1;
}
#define X fe 
#define Y se 
template<typename A, typename B>
pair<A, B> operator+(const pair<A, B>& a, const pair<A, B>& b)
{
	return mp(a.X + b.X, a.Y + b.Y);
}
template<typename A, typename B>
pair<A, B> operator+=(pair<A, B>& a, const pair<A, B>& b)
{
	a.X += b.X;
	a.Y += b.Y;
	return a;
}
template<typename A, typename B>
pair<A, B> operator-(const pair<A, B>& a, const pair<A, B>& b)
{
	return mp(a.X - b.X, a.Y - b.Y);
}
template<typename A, typename B>
pair<A, B> operator-(const pair<A, B>& a)
{
	return mp(-a.X, -a.Y);
}
template<typename A, typename B>
pair<A, B>& operator++(pair<A, B>& a)
{
	++a.X;
	++a.Y;
	return a;
}
template<typename A, typename B>
pair<A, B>& operator--(pair<A, B>& a)
{
	--a.X;
	--a.Y;
	return a;
}
template<typename A>
vector<A>& operator++(vector<A>& a)
{
	for (auto it = a.begin(); it != a.end(); ++it)
		++* it;
	return a;
}
template<typename A>
vector<A>& operator--(vector<A>& a)
{
	for (auto it = a.begin(); it != a.end(); ++it)
		--* it;
	return a;
}
template<typename A, typename B>
pair<A, B> operator++(pair<A, B>& a, int)
{
	pair<A, B> b = a;
	++a;
	return b;
}
template<typename A, typename B>
pair<A, B> operator--(pair<A, B>& a, int)
{
	pair<A, B> b = a;
	--a;
	return b;
}
template<typename A>
vector<A>& operator++(vector<A>& a, int)
{
	vector<A> b = a;
	++a;
	return b;
}
template<typename A>
vector<A>& operator--(vector<A>& a, int)
{
	vector<A> b = a;
	--a;
	return b;
}
template<typename A, typename B>
pair<A, B> operator-=(pair<A, B>& a, const pair<A, B>& b)
{
	a.X -= b.X;
	a.Y -= b.Y;
	return a;
}
bool pow2(int i){ return i&&(i&-i)==i;}
constexpr int pct(int x) { return __builtin_popcount(x); } 
constexpr int bits(int x) { return 31-__builtin_clz(x); } // floor(log2(x))
ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down
ll half(ll x) { return fdiv(x,2); }
bool inc(ll a,ll b,ll c){
	return a<=b&&b<=c;
}
template<class t>
int lwb(const vector<t>&v,const t&a){
	return lower_bound(all(v),a)-v.begin();
}

template<class T> inline T lowbit(T n){return (n^(n-1))&n;}//NOTES:lowbit(
template <typename I> struct _reversed_struct { I &v_; explicit _reversed_struct(I &v) : v_{v} {} typename I::reverse_iterator begin() const { return v_.rbegin(); } typename I::reverse_iterator end() const { return v_.rend(); } };
template <typename I> _reversed_struct<I> reversed(I &v) { return _reversed_struct<I>(v); }
template <typename T1, typename T2> typename vector<pair<T1, T2>>::iterator lower_bound(const vector<pair<T1, T2>> &v, const T1 &x) { return lower_bound(all(v), x, [](pair<T1, T2> a, pair<T1, T2> b) { return a.fe < b.fe; }); }
template <typename T1, typename T2> typename vector<pair<T1, T2>>::iterator upper_bound(const vector<pair<T1, T2>> &v, const T1 &x) { return upper_bound(all(v), x, [](pair<T1, T2> a, pair<T1, T2> b) { return a.fe < b.fe; }); }
#define L1(u, ...) [&](auto &&u) { return __VA_ARGS__; }
#define L2(u, v, ...) [&](auto &&u, auto &&v) { return __VA_ARGS__; }
#define sort_by(x, y) sort(all(x), [&](const auto &l, const auto &r) { return y; })
bool isUpperCase(char c){return c>='A' && c<='Z';}//NOTES:isUpperCase(
bool isLowerCase(char c){return c>='a' && c<='z';}//NOTES:isLowerCase(
bool isLetter(char c){return c>='A' && c<='Z' || c>='a' && c<='z';}//NOTES:isLetter(
bool isDigit(char c){return c>='0' && c<='9';}//NOTES:isDigit(
char toLowerCase(char c){return (isUpperCase(c))?(c+32):c;}//NOTES:toLowerCase(
char toUpperCase(char c){return (isLowerCase(c))?(c-32):c;}//NOTES:toUpperCase(
int toInt(string s){int r=0;istringstream sin(s);sin>>r;return r;}//NOTES:toInt(
ll toInt64(string s){ll r=0;istringstream sin(s);sin>>r;return r;}//NOTES:toInt64(
double toDouble(string s){double r=0;istringstream sin(s);sin>>r;return r;}//NOTES:toDouble(
template<class T> inline T sqr(T x){return x*x;}//NOTES:sqr
double dist(double x1,double y1,double x2,double y2){return sqrt(sqr(x1-x2)+sqr(y1-y2));}//NOTES:dist(
double distR(double x1,double y1,double x2,double y2){return sqr(x1-x2)+sqr(y1-y2);}//NOTES:distR(
template<class T> T cross(T x0,T y0,T x1,T y1,T x2,T y2){return (x1-x0)*(y2-y0)-(x2-x0)*(y1-y0);}//NOTES:cross(
int crossOper(double x0,double y0,double x1,double y1,double x2,double y2)//NOTES:crossOper(
  {double t=(x1-x0)*(y2-y0)-(x2-x0)*(y1-y0);if (fabs(t)<=eps) return 0;return (t<0)?-1:1;}
bool isIntersect(double x1,double y1,double x2,double y2,double x3,double y3,double x4,double y4)//NOTES:isIntersect(
  {return crossOper(x1,y1,x2,y2,x3,y3)*crossOper(x1,y1,x2,y2,x4,y4)<0 && crossOper(x3,y3,x4,y4,x1,y1)*crossOper(x3,y3,x4,y4,x2,y2)<0;}
bool isMiddle(double s,double m,double t){return fabs(s-m)<=eps || fabs(t-m)<=eps || (s<m)!=(t<m);}//NOTES:isMiddle(
#define removebit(n, b) ((n) & ~(static_cast<std::decay<decltype(n)>::type>(1) << (b)))
constexpr ll power(ll x, int p) { return p == 0 ? 1 : (x * power(x, p - 1)); }
#define tol(s) transform(s.begin(),s.end(),s.begin(),::tolower);
#define tou(s) transform(s.begin(),s.end(),s.begin(),::toupper);
bool isPower(ll x, ll y) {  ll res1 = log(y) / log(x); double res2 = log(y) / log(x); return (res1 == res2); } 

tcT> bool chmin(T& a, const T& b) {
	return b < a ? a = b, 1 : 0; } 
tcT> bool chmax(T& a, const T& b) {
	return a < b ? a = b, 1 : 0; }
void TIME(){
	#ifdef __APPLE__
	    cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
	#endif
}

tcT> void remDup(vector<T>& v) { 
	sort(all(v)); v.erase(unique(all(v)),end(v)); }
tcTU> void remAll(vector<T>& v, U a){
	v.erase(remove(all(v),a),v.end());
}

tcTU> T fstTrue(T lo, T hi, U f) {  //smallest
	while (lo < hi) {
		T mid = half(lo+hi);
		f(mid) ? hi = mid : lo = mid+1; 
	} 
	return lo;
}
tcTU> T lstTrue(T lo, T hi, U f) { //largest
	while (lo < hi) { 
		T mid = half(lo+hi+1);
		f(mid) ? lo = mid : hi = mid-1;
	} 
	return lo;
}

// TO_STRING
tcTU3> string ts(tuple<T,U,C> p);
tcTU4> string ts(tuple<T,U,C,D> p);
string ts(char c) { return string(1,c); }
string ts(bool b) { 
    #ifdef __APPLE__
		return b ? "true" : "false"; 
	#else 
		return ts((int)b);
	#endif
}
string ts(const char* s) { return (string)s; }
string ts(string s) { return s; }
tcT> string ts(complex<T> c) { 
	stringstream ss; ss << c; return ss.str(); }
string ts(vb v) { 
	string res = "{"; F0R(i,sz(v)) res += char('0'+v[i]);
	res += "}"; return res; }
template<size_t SZ> string ts(bitset<SZ> b) {
	string res = ""; F0R(i,sz(b)) res += char('0'+b[i]);
	return res; }
tcTU> string ts(pair<T,U> p);
tcT> string ts(T v) { // containers with begin(), end()
	#ifdef __APPLE__
		bool fst = 1; string res = "{";
		for (const auto& x: v) {
			if (!fst) res += ", ";
			fst = 0; res += ts(x);
		}
		res += "}"; return res;
	#else
		bool fst = 1; string res = "";
		for (const auto& x: v) {
			if (!fst) res += " ";
			fst = 0; res += ts(x);
		}
		return res;
	#endif
}
tcTU> string ts(pair<T,U> p) {
	#ifdef __APPLE__
		return "("+ts(p.fe)+", "+ts(p.se)+")"; 
	#else
		return ts(p.fe)+" "+ts(p.se);
	#endif
}
tcTU3> string ts(tuple<T,U,C> p) { 
	#ifdef __APPLE__
	    return "("+ts(get<0>(p))+","+ts(get<1>(p))+","+ts(get<2>(p))+")";
	#else 
	    return ts(get<0>(p))+" "+ts(get<1>(p))+" "+ts(get<2>(p));
	#endif
}
tcTU4> string ts(tuple<T,U,C,D> p) {
	#ifdef __APPLE__
	    return "("+ts(get<0>(p))+","+ts(get<1>(p))+","+ts(get<2>(p))+","+ts(get<3>(p))+")";
	#else 
	    return ts(get<0>(p))+" "+ts(get<1>(p))+" "+ts(get<2>(p))+" "+ts(get<3>(p));
	#endif
}
//INPUT  void re(string& d){getline(cin,d) ;getline(cin,d); }

tcTU3> void re(tuple<T,U,C>& p);
tcTU4> void re(tuple<T,U,C,D>& p);
tcT> void re(complex<T>& c);
tcTU> void re(pair<T,U>& p);
tcT> void re(vector<T>& v);
tcT> void rv(int n, vector<T>& x) { x.rsz(n); re(x); }

tcT, size_t SZ> void re(array<T,SZ>& a);
tcT> void re(T& x) { cin >> x; }
void re(double& d) { string t; re(t); d = stod(t); }
void re(ld& d) { string t; re(t); d = stold(t); }
tcTUU> void re(T& t, U&... u) { re(t); re(u...); }
tcT> void re(complex<T>& c) { T a,b; re(a,b); c = {a,b}; }
tcTU> void re(pair<T,U>& p) { re(p.fe,p.se); }
tcT> void re(vector<T>& x) { trav(a,x) re(a); }
tcT, size_t SZ> void re(array<T,SZ>& x) { trav(a,x) re(a); }
tcTU3> void re(tuple<T,U,C>& p){re(get<0>(p),get<1>(p),get<2>(p));}
tcTU4> void re(tuple<T,U,C,D>& p){re(get<0>(p),get<1>(p),get<2>(p),get<3>(p));}
// OUTPUT
tcT> void pr(T x) { cout << ts(x); }
tcTUU> void pr(const T& t, const U&... u) { 
	pr(t); pr(u...); }
void ps() { pr("\n"); } // print w/ spaces
tcTUU> void ps(const T& t, const U&... u) { 
	pr(t); if (sizeof...(u)) pr(" "); ps(u...); }
 
struct chash {
	static uint64_t splitmix64(uint64_t x) {
		// http://xorshift.di.unimi.it/splitmix64.c
		x += 0x9e3779b97f4a7c15;
		x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
		x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
		return x ^ (x >> 31);
	}
 
	size_t operator()(uint64_t x) const {
		static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
		return splitmix64(x + FIXED_RANDOM);
	}
	
	size_t operator()(pair<int,int> x)const{
		return operator()(uint64_t(x.first)<<32|x.second);
	}
};

tcT> using V = vector<T>; 
tcT, size_t SZ> using AR = array<T,SZ>; 
tcT> using mpq = priority_queue<T, vector<T>, greater<T>>;
tcT> using pq = priority_queue<T>;
tcTU> using um = unordered_map<T,U,chash>;
tcT> using us = unordered_set<T, chash>;
tcT> using PR = pair<T,T>;
#define one(x) memset(x,-1,sizeof(x))
#define zero(x) memset(x,0,sizeof(x))

// const int MOD = 1e9+7; 
const int MOD =998244353;


// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// #include <ext/rope>

// using namespace __gnu_pbds;
// using namespace __gnu_cxx;

// #define fbo find_by_order 
// #define ook order_of_key 

// tcT> using oset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
// tcTU> using ht = gp_hash_table<T,U,chash>;
// template<class key, class value, class cmp = std::less<key>> using omap = tree<key, value, cmp, rb_tree_tag, tree_order_statistics_node_update>;

// using cd = complex<ld>;
// using vcd = vector<cd>;

// int atMost(oset<pi>& T, int r) { 
// 	return T.ook({r,MOD}); }
// int getSum(oset<pi>& T, int l, int r) { 
// 	return atMost(T,r)-atMost(T,l-1); }

// fbo(k)  returns iterator to kth element starting from 0;
// ook(k) returns count of elements strictly smaller than k;




template<int MOD, int RT> struct mint {
	static const int mod = MOD;
	static constexpr mint rt() { return RT; } // primitive root for FFT
	int v; explicit operator int() const { return v; } // explicit -> don't silently convert to int
	mint() { v = 0; }
	mint(ll _v) { v = (-MOD < _v && _v < MOD) ? _v : _v % MOD;
		if (v < 0) v += MOD; }
	friend bool operator==(const mint& a, const mint& b) { 
		return a.v == b.v; }
	friend bool operator!=(const mint& a, const mint& b) { 
		return !(a == b); }
	friend bool operator<(const mint& a, const mint& b) { 
		return a.v < b.v; }
	friend void re(mint& a) { ll x; re(x); a = mint(x); }
	friend string ts(mint a) { return ts(a.v); }
   
	mint& operator+=(const mint& m) { 
		if ((v += m.v) >= MOD) v -= MOD; 
		return *this; }
	mint& operator-=(const mint& m) { 
		if ((v -= m.v) < 0) v += MOD; 
		return *this; }
	mint& operator*=(const mint& m) { 
		v = (ll)v*m.v%MOD; return *this; }
	mint& operator/=(const mint& m) { return (*this) *= inv(m); }
	friend mint pow(mint a, ll p) {
		mint ans = 1; assert(p >= 0);
		for (; p; p /= 2, a *= a) if (p&1) ans *= a;
		return ans; }
	friend mint inv(const mint& a) { assert(a.v != 0); 
		return pow(a,MOD-2); }
		
	mint operator-() const { return mint(-v); }
	mint& operator++() { return *this += 1; }
	mint& operator--() { return *this -= 1; }
	friend mint operator+(mint a, const mint& b) { return a += b; }
	friend mint operator-(mint a, const mint& b) { return a -= b; }
	friend mint operator*(mint a, const mint& b) { return a *= b; }
	friend mint operator/(mint a, const mint& b) { return a /= b; }
};
 
typedef mint<MOD,5> mi; // 5 is primitive root for both common mods
typedef vector<mi> vmi;
typedef pair<mi,mi> pmi;
typedef vector<pmi> vpmi;
 
vector<vmi> scmb; // small combinations
void genComb(int SZ) {
	scmb.assign(SZ,vmi(SZ)); scmb[0][0] = 1;
	FOR(i,1,SZ) F0R(j,i+1) 
		scmb[i][j] = scmb[i-1][j]+(j?scmb[i-1][j-1]:0);
}
vi invs, fac, ifac; // make sure to convert to LL before doing any multiplications ...
void genFac(int SZ) {
	invs.resize(SZ), fac.resize(SZ), ifac.resize(SZ); 
	invs[1] = fac[0] = ifac[0] = 1; 
	FOR(i,2,SZ) invs[i] = MOD-(ll)MOD/i*invs[MOD%i]%MOD;
	FOR(i,1,SZ) {
		fac[i] = (ll)fac[i-1]*i%MOD;
		ifac[i] = (ll)ifac[i-1]*invs[i]%MOD;
	}
}
mi comb(int a, int b) {
	if (a < b || b < 0) return 0;
	return (ll)fac[a]*ifac[b]%MOD*ifac[a-b]%MOD;
} 

ll gcd(ll a,ll b) {  return b?gcd(b,a%b):a;}
ll lcm(ll a,ll b) {  return (a / gcd(a, b)) * b;}
ll ncr(ll n, ll r){ ll p = 1, k = 1; if (n - r < r) r = n - r; if (r != 0) { while (r) { p *= n; k *= r; ll m = gcd(p, k); p /= m; k /= m; n--; r--; }  }  else p = 1; return p;}

// DEBUG
void DBG() { cerr << "]" << endl; }
tcTUU> void DBG(const T& t, const U&... u) {
	cerr << ts(t); if (sizeof...(u)) cerr << ", ";
	DBG(u...); }
#ifdef __APPLE__ // chk -> fake assert
	#define dbg(...) cerr << "Line(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
	#define chk(...) if (!(__VA_ARGS__)) cerr << "Line(" << __LINE__ << ") -> function(" \
		 << __FUNCTION__  << ") -> CHK FAILED: (" << #__VA_ARGS__ << ")" << "\n", exit(0);
#else
	#define dbg(...) 0
	#define chk(...) 0
#endif

V<vi> readGraph(int n,int m){
	V<vi>g(n);
	F0R(i,m){
		int a,b;
		re(a,b);
		a--;b--;
		g[a].pb(b);
		g[b].pb(a);
	}
	return g;
}
 
V<vi> readTree(int n){
	return readGraph(n,n-1);
}

void setPrec() { cout << fixed << setprecision(15); }
void setIn(str s) { freopen(s.c_str(),"r",stdin); }
void setOut(str s) { freopen(s.c_str(),"w",stdout); }
void unsyncIO() { cin.tie(0)->sync_with_stdio(0); }
void setIO(str s = "") {
	unsyncIO(); setPrec();
	// cin.exceptions(cin.failbit); 
	// throws exception when do smth illegal
	// ex. try to read letter into int
	if (sz(s)) { setIn(s+".in");setOut(s+".out"); } // for USACO
}


const int mxN = 1e5 + 5;

void solve(){
    int n;
    re(n);
    ll ans=0;
    map<pi,int>m;
    F0R(i,n){
        int x,y,u,v;
        re(x,y,u,v);
        int a=u-x,b=v-y,g=gcd(abs(a),abs(b));
        a/=g;
        b/=g;
        pi z={a,b};
        ans+=m[z];
        m[-z]++;
    }
    ps(ans);
}
int main() {
	setIO(); 
	int T = 1; re(T);
	FOR(_,1,T+1) {
		//pr("Case #",_,": ");
		solve();
	}
	// you should actually read the stuff at the bottom
}

/* stuff you should look for
	* int overflow, array bounds
	* special cases (n=1?)
	* do smth instead of nothing and stay organized
	* WRITE STUFF DOWN
	* DON'T GET STUCK ON ONE APPROACH
*/