#include <algorithm>
#include <cmath>
#include <iostream>
#include <numeric>
#include <queue>
#include <unordered_map>
#include <vector>
using namespace std;
using ll = long long;
#define rep(i, j, n) for (int i = j; i < (n); ++i)
#define rrep(i, j, n) for (int i = (n)-1; j <= i; --i)
#define all(a) a.begin(), a.end()
template <typename T>
std::ostream &operator<<(std::ostream &os, std::vector<T> &a) {
  for (size_t i = 0; i < a.size(); ++i) os << (i > 0 ? " " : "") << a[i];
  return os << '\n';
}
template <typename T>
std::istream &operator>>(std::istream &is, std::vector<T> &a) {
  for (T &x : a) { is >> x; }
  return is;
}
constexpr ll MOD = 1000000007;

ll mpow(ll x, ll e) {
  ll res = 1;
  while (e > 0) {
    if (e & 1) res = res * x % MOD;
    x = x * x % MOD;
    e >>= 1;
  }
  return res;
}

int main() {
  cin.tie(0)->sync_with_stdio(0);
  ll n, m;
  cin >> n >> m;
  // 各桁の期待値 2^i * 1/2
  // 0~m-1 2^i
  // 2^m
  cout << (mpow(2, m) - 1) * 500000004 % MOD;
  return 0;
}