def main():
    from math import sqrt,sin,cos,tan,ceil,radians,floor,gcd,exp,log,log10,log2,factorial,fsum
    from heapq import heapify, heappop, heappush
    from bisect import bisect_left, bisect_right
    from copy import deepcopy
    import copy
    import random
    from collections import deque,Counter,defaultdict
    from itertools import permutations,combinations
    from decimal import Decimal,ROUND_HALF_UP
    #tmp = Decimal(mid).quantize(Decimal('0'), rounding=ROUND_HALF_UP)
    from functools import lru_cache, reduce
    #@lru_cache(maxsize=None)
    from operator import add,sub,mul,xor,and_,or_,itemgetter
    INF = 10**18
    mod1 = 10**9+7
    mod2 = 998244353
    
    #DecimalならPython
    #再帰ならPython!!!!!!!!!!!!!!!!!!!!!!!!!!
    
    
    '''
    やば
    主客転倒
    Kがでかすぎる
    式で処理できないと無理
    漸化式立てて行列累乗とかあり得る
    真部分集合は全く同じものは含まないらしい
    足してからかけてもよい
    '''
    
    N,K = map(int, input().split())
    
    tmp = (K+3)*K%mod1*pow(2,mod1-2,mod1)%mod1
    up = pow(tmp,N,mod1)
    tmp = (K+1)*K%mod1*pow(2,mod1-2,mod1)%mod1
    dwn = pow(tmp,N,mod1)
    print((up-dwn)%mod1)
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
if __name__ == '__main__':
    main()