#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using mint = modint1000000007;
using ll = long long;
#define rep(i, l, n) for (int i = (l); i < (n); i++)

int main(void) {
	int t;	cin >> t;
	mint two = 2;	mint rev2 = two.inv();
	mint six = 6;	mint rev6 = six.inv();

	rep(i, 0, t) {
		ll n, m;	cin >> n >> m;
		mint N = (mint)n;

		mint a = N.pow(m);	mint b = N.pow(m / 2);
		mint s = rev2 * a * (a + 1);
		mint t = rev6 * b * (b + 1) * (b * 2 + 1);

		mint ans = s - t;
		cout << ans.val() << endl;
	}

	return 0;
}