#include<iostream>
#include<string>
#include<iomanip>
#include<cmath>
#include<vector>
#include<algorithm>
#include<utility>

using namespace std;

#define int long long
#define endl "\n"

constexpr long long INF = (long long)1e18;
constexpr long long MOD = 1'000'000'007; 

struct fast_io {
	fast_io(){
		std::cin.tie(nullptr);
		std::ios::sync_with_stdio(false);
	};
} fio;

signed main(){
	cout<<fixed<<setprecision(10);
	
	int P, K;
	int zero = 1, nzero = 0;
	
	cin>>P>>K;
	
	for(int i = 0; i < K; i++){
		int nz = 0, nnz = 0;
		
		nz = zero * (P+1) % MOD + nzero * 2;
		nnz = zero * (P-1) % MOD + nzero * (P-1) * 2 % MOD; 
		
		zero = nz % MOD;
		nzero = nnz % MOD;
	}
	
	cout<<zero<<endl;
	
	
	return 0;
}