#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int Mod=998244353;
const ll INF = -10000000000000;
 
void solve() {
    int n;
    cin >> n;
    vector<int> a(n);
    for(int i=0;i<n;i++) cin >> a[i];
    ll ans = a[n-1];
    for(int i=0;i<n-2;i++) ans+=a[i];
    cout << ans - a[n-2] << '\n';
}
 
int main(){ 
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int t;
    cin >> t;
    while (t--) solve();
 
 
    return 0;
}
 

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2 1
3
2 2 8
4
1 2 4 3
5
1 2 3 4 5
5
3 2 4 5 4