code: def integrate(self, f):
      coords = self.coords
      nsd = self.nsd
  
      limit = 1
      for p in coords:
          limit -= p
  
      intf = f
      for d in range(0, nsd):
          p = coords[d]
          limit += p
          intf = integrate(intf, (p, 0, limit))
      return intf
  
file_path: sympy/examples/advanced/fem.py
imports: from sympy import symbols, Symbol, factorial, Rational, zeros, eye, integrate, diff, pprint, reduced
label_desc: Use image node_id 2 for calling the ReferenceSimplex obj's underlying member method code with example usage: obj.integrate(f) and returns: intf