//syc
#include<bits/stdc++.h>
using namespace std;
const int R=2e5;
const int N=2e5+10;
const int mod=1e9+7;
int T;
int n, m;
int fac[N], inv[N], invfac[N];
void init(){
    inv[1]=fac[0]=invfac[0]=1;
    for(int i=2;i<=R;i++)
        inv[i]=1ll*(mod-mod/i)*inv[mod%i]%mod;
    for(int i=1;i<=R;i++)
        fac[i]=1ll*fac[i-1]*i%mod;
    for(int i=1;i<=R;i++)
        invfac[i]=1ll*invfac[i-1]*inv[i]%mod;
}
int calc(){
    return 1ll*(1ll*(n+m)*(n+m+1)/2-
    1ll*n*(n+1)/2-1ll*m*(m+1)/2-1)%mod*
    fac[n+m-2]%mod*invfac[n-1]%mod*
    invfac[m-1]%mod;
}
signed main(){
    cin>>T;
    init();
    while(T--){
        cin>>n>>m;
        cout<<calc()<<'\n';
    }
    return 0;
}