#include <iostream>
#include <array>

constexpr int mod = 1000'000'007;
using matrix_2D = std::array<long long int, 4>;
matrix_2D mult(const matrix_2D& x, const matrix_2D& y){
    return matrix_2D({
        (x[0] * y[0] + x[1] * y[2]) % mod,
        (x[0] * y[1] + x[1] * y[3]) % mod,
        (x[2] * y[0] + x[3] * y[2]) % mod,
        (x[2] * y[1] + x[3] * y[3]) % mod
    });
}

matrix_2D power(const matrix_2D& a, int n){
    if(n == 0) return matrix_2D({1, 0, 0, 1});
    const matrix_2D p = power(a, n / 2);
    const matrix_2D res = mult(p, p);
    if(n & 1) return mult(a, res);
    return res;
}

int main(void){
    std::cin.tie(nullptr); std::cin.sync_with_stdio(false); std::cout.tie(nullptr);
    int P, K; std::cin >> P >> K;
    const matrix_2D a = matrix_2D({2 * (P - 1), 1LL, 2 * (P - 1), P + 1}); 
    const matrix_2D x = power(a, K);
    std::cout << x[3] << '\n';
    return 0;
}