#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ii pair <int, int>
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcountll
#define ll long long
#define mp make_pair
#define f first
#define s second
#define Time (double)clock()/CLOCKS_PER_SEC
#define debug(x) std::cout << #x << ": " << x << '\n';
signed main() {
    #ifdef HOME
    freopen("input.txt", "r", stdin);
    #else
    #define endl '\n'
    ios_base::sync_with_stdio(0); cin.tie(0);
    #endif

    int n;
    cin >> n;

    #define x first
    #define y second

    vector <ii> a(n);
    for (int i = 0; i < n; ++i)
        cin >> a[i].x >> a[i].y;

    int ans = 0;
    const int MOD = 1000 * 1000 * 1000 + 7;
    for (int i = 0; i < n; ++i) {
        int x = a[i].x, y = a[i].y;
        for (int j = i + 1; j < n; ++j) {
            for (int k = j + 1; k < n; ++k) {
                //ans += abs((a[j].x - x) * (a[k].y - y) - (a[j].y - y) * (a[k].x - x));
                int C = a[j].x * a[k].y - a[j].y * a[k].x;
                ans += abs(C + x * (a[j].y - a[k].y) + y * (a[k].x - a[j].x));
                ans %= MOD;
            }   
        }   
    }
    cout << ans << endl;
}