use std::io;

const MOD: isize = 1_000_000_007;
fn preculc(x: usize) -> (Vec<isize>, Vec<isize>) {
    let mut fact: Vec<isize> = vec![1; x];
    let mut inv: Vec<isize> = vec![1; x];
    let mut inv_fact: Vec<isize> = vec![1; x];
    for i in 1..x {
        fact[i] = (fact[i - 1] * i as isize) % MOD;
    }
    for i in 2..x {
        inv[i] = MOD - inv[MOD as usize % i] * (MOD / i as isize) % MOD;
    }
    for i in 1..x {
        inv_fact[i] = (inv_fact[i - 1] * inv[i]) % MOD;
    }
    (fact, inv_fact)
}

fn main() {
    let mut t = String::new();
    io::stdin().read_line(&mut t).ok();
    let t: usize = t.trim().parse().unwrap();

    let (fact, inv_fact) = preculc(400_000);

    for _ in 0..t {
        let mut s = String::new();
        io::stdin().read_line(&mut s).ok();
        let mut itr = s.trim().split_whitespace();
        let h: usize = itr.next().unwrap().parse().unwrap();
        let w: usize = itr.next().unwrap().parse().unwrap();
        if h == 1 || w == 1 {
            println!("{}", 0);
            continue;
        }
        let ans = 2 * (h + w - 3) as isize * ((((fact[h + w - 4] * inv_fact[h - 2]) % MOD) * inv_fact[w - 2]) % MOD);
        println!("{}", ans % MOD);
    }
}