func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long mod = 1e9 + 7;   inline long long quick(long long mul, long long b) {     long long c = 1;     while (b) {       if (b & 1) {         c = c * mul % mod;       }       mul = mul * mul % mod;       b /= 2;     }     return c;   }   int main() {     long long n, m;     cin >> n >> m;     cout << (quick(2 * n + 2, m) * (n - m + 1) % mod) * quick(n + 1, mod - 2) %                 mod;     return 0;   }   