#include <iostream>
using namespace std;
int main()
{
int f, r, t, otv;
cout << "Введите f: ";
cin >> f;
cout << "Введите r: ";
cin >> r;
cout << "Введите t: ";
cin >> t;
otv = (r - t + f * t) - r * t * t + (t + r);
cout << "(r – t + f * t) – r * t * t + (t + r) = "<< otv << endl;
}