import sys
#input = sys.stdin.readline #文字列につけてはダメ
input = sys.stdin.buffer.readline #文字列につけてはダメ
#sys.setrecursionlimit(1000000)
#import bisect
#import itertools
#import random
#from heapq import heapify, heappop, heappush
#from collections import defaultdict 
#from collections import deque
#import copy
#from functools import lru_cache
import math

def main():
    n,m = map(int,input().split()); MOD = pow(10,9) + 7
    ans = pow(2,m-1,MOD) - pow(2,MOD-2,MOD)
    print(ans%MOD)


if __name__ == '__main__':
    main()