#include<bits/stdc++.h>

using namespace std;

using int64 = long long;
const int mod = 1e9 + 7;

#pragma GCC optimize ("O3")
#pragma GCC target ("avx")

int main() {
  int n, x[2000], y[2000];
  cin >> n;
  for(int i = 0; i < n; i++) {
    cin >> x[i] >> y[i];
  }
  int64 ret = 0;
  for(int i = 0; i < n; i++) {
    for(int j = i + 1; j < n; j++) {
      for(int z = j + 1; z < n; z++) {
        ret += abs((x[j] - x[i]) * (y[j] + y[i]) + (x[i] - x[z]) * (y[i] + y[z]) + (x[z] - x[j]) * (y[z] + y[j]));
      }
    }
  }
  cout << ret % mod << "\n";
}