import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

mod = 10**9+7
for _ in range(ni()):
    n, m = na()
    m//=2
    X = pow(n,m,mod)
    A = (1 + pow(n, 2*m, mod))*pow(n, 2*m, mod)//2%mod
    B = X*(X+1)*(2*X+1)//6%mod
    print((A-B)%mod)