using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
using System.Globalization;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (p, k) = (c[0], c[1]);
        var mod = 1_000_000_007;
        var dp = new long[2];
        var ndp = new long[2];
        dp[0] = 1;
        for (var i = 0; i < k; ++i)
        {
            ndp[0] = (dp[0] * (p + 1) % mod + dp[1] * 2) % mod;
            ndp[1] = (dp[0] * (p - 1) % mod + dp[1] * (p * 2 - 2) % mod) % mod;
            (dp, ndp) = (ndp, dp);
        }
        WriteLine(dp[0]);
    }
}