Untitled

#include <iostream>
#include <fstream>
#include <vector>
#include <string>
using namespace std;
float f(float a) {
	return a * 2 - 4 * a;
}
float y(float b) {
	return -8*b + 4;
}
float g(float a, float b) {
	return f(a) * a - y(b) * b;
}
int main() {
	ifstream in("func.txt");
	ofstream out("result.txt");

	float a, b;
	int c;
	in >> c;
	for (int i = 0; i < c; i++){
		in >> a >> b;
		out << g(a, b) << '\n';
	}
}