import sys
import numpy as np

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

P, K = map(int, read().split())

MOD = 10 ** 9 + 7

def mat_mul(A, B):
    mask = (1 << 15) - 1
    A1 = A >> 15
    A2 = A & mask
    B1 = B >> 15
    B2 = B & mask
    X = np.dot(A1, B1) % MOD
    Y = np.dot(A2, B2) % MOD
    Z = (np.dot(A1 + A2, B1 + B2) - X - Y) % MOD
    return ((X << 30) + (Z << 15) + Y) % MOD


def power(A, n):
    if n == 1:
        return A
    B = power(A, n // 2)
    B = mat_mul(B, B)
    if n & 1:
        B = mat_mul(A, B)
    return B

A = np.array([[P+1, 2], [P-1,2*P-2]], np.int64)

print(power(A, K)[0,0])