mod = 1_000_000_007

def mat_prod(m1, m2):
    m2t = tuple(zip(*m2))
    return [[sum(m1ik * m2kj for m1ik, m2kj in zip(m1i, m2_j)) % mod for m2_j in m2t] for m1i in m1]

def mat_pow(m, p):
    if p == 1:
        return m
    mp = mat_pow(m, p // 2)
    mp = mat_prod(mp, mp)
    if p % 2:
        mp = mat_prod(mp, m)
    return mp

def mat_pow_vec(m, p, v):
    if p == 0:
        return v
    mp = mat_pow(m, p)
    return [sum(mpij * vj for mpij, vj in zip(mpi, v)) % mod for mpi in mp]

a, b, c, d, e, n = map(lambda s_: int(s_), input().split())
f = a + b - c * a
m = [
    [c % mod, d % mod, e % mod, f % mod],
    [1, 0, 0, 0],
    [0, 0, 1, 1],
    [0, 0, 0, 1],
]
v = [a % mod, 0, 0, 1]
nv = mat_pow_vec(m, n, v)
print(nv[0] % mod)