#include <bits/stdc++.h>
#include <atcoder/modint>
using mint = atcoder::modint1000000007;
using namespace std;
using ll = long long;

int main() {
    ll n, m;
    cin >> n >> m;

    mint x = mint(2).pow(m);
    x = (x - 1) / 2;
    cout << x.val() << endl;

    return 0;
}