import java.util.Scanner;

public class Main {
	static final int MOD = 1000000007;
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		long[] x = new long[n];
		long[] y = new long[n];
		for ( int i = 0 ; i < n ; i++ ) {
			x[i] = Long.parseLong(sc.next());
			y[i] = Long.parseLong(sc.next());
		}
		sc.close();
		
		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 += Math.abs((x[k] - x[i]) * (y[j] - y[i]) - (y[k] - y[i]) * (x[j] - x[i]));
				}
			}
		}

		System.out.println(ans % MOD);
	}
}