import functools
import sys
import typing
from typing import Callable, Dict, List, Set, Tuple


sys.setrecursionlimit(10 ** 6)
sinput: Callable[..., str] = sys.stdin.readline
debug = functools.partial(print, file=sys.stderr)
MOD: int = 998244353
INF: float = float("Inf")
IINF: int = sys.maxsize // 2


def main() -> None:
    n, m = map(int, sinput().split())
    MOD = 1000000007
    p = (pow(2, m, MOD) - 1) % MOD
    q = pow(2, -1, MOD)

    print(q * p % MOD)


if __name__ == "__main__":
    main()