Untitled

#include <iostream>
#include <fstream>
using namespace std;

int f(int a)
{
    return a * 2 - 4 * a;
}

int y(int b)
{
    return -8 * b + 4;
}

int g(int a, int b)
{
    return f(a) * a - y(b) * b;
}

int main()
{
    ifstream in("func.txt");
    ofstream out("result.txt");
    int a, b;
    int n;
    in >> n;
       
    for (int i = 0; i < n; i++)
    {
        in >> a >> b;
        out << g(a,b) << endl;
    }
}