#include <bits/stdc++.h>
using namespace std;
 
#define fi first
#define se second
#define pb push_back
using vi = vector <int>;
using ll = long long;
using pii = pair <int, int>;
//~ const ll mod = 998244353;
const ll mod = 1e9 + 7;
ll qpow(ll a, ll b, ll m = mod) { ll r = 1, t = a;
	for(; b; b /= 2) { if(b & 1) r = r * t % m; t = t * t % m; } return r; }

int main() {
	ios :: sync_with_stdio(false);
	int n; ll p; cin >> p >> n;
	
	ll a = 1, b = 0;
	for(int i = 0; i < n; i ++) {
		ll c = ((p + 1) * a + 2 * b) % mod;
		ll d = ((p - 1) * a + (2 * p - 2) * b) % mod;
		a = c;
		b = d;
	}
	
	cout << a << '\n';
}