import sys

input = sys.stdin.buffer.readline

MOD = 10 ** 9 + 7
MAX = 4 * 10 ** 5 + 10
# https://tjkendev.github.io/procon-library/python/math/factorial.html から拝借しています。
fact = [1] * (MAX + 1)
rfact = [1] * (MAX + 1)
r = 1
for i in range(1, MAX + 1):
    fact[i] = r = r * i % MOD
rfact[MAX] = r = pow(fact[MAX], MOD - 2, MOD)
for i in range(MAX, 0, -1):
    rfact[i - 1] = r = r * i % MOD


def comb(n, k, error=0):
    if not 0 <= k <= n:
        return error
    return fact[n] * rfact[k] * rfact[n - k] % MOD


def solve(H, W):
    return 2 * comb(H + W - 4, H - 2) * (H + W - 3) % MOD


T = int(input())
for _ in range(T):
    print(solve(*map(int, input().split())))