#include <iostream>
#include <vector>
#include <utility>
using namespace std;

#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
constexpr unsigned int MOD=1000000007;
int main(){
    int n;cin>>n;
    vector<pair<int,int>> p(n);

    for(int i=0;i<n;i++){
        cin>>p[i].first>>p[i].second;
    }
    unsigned long long ans=0;
    for(int i=0;i<n;i++){
        for(int j=i+1;j<n;j++){
            for(int k=j+1;k<n;k++){
                ans+=abs((p[i].first-p[k].first)*(p[j].second-p[k].second)-(p[j].first-p[k].first)*(p[i].second-p[k].second));
            }
        }
    }

    ans%=MOD;
    cout<<ans<<endl;

    return 0;
}