#include <iostream>
#include <fstream>
#include <cmath>

using namespace std;

ofstream out("Tabel.txt");

int main()
{
    double x, y;
    double PI = atan(1) * 4;

    for(x = -3; x <= 8; x += 1){
        if(x < 0){
            y = (sqrt(pow(x, 2) + 1) - x) / (pow(x, 3) - 1);
        }else if(x < PI){
            y = 5 * pow (cos(x), 7) - 1 + (3 + sin(2 * x)) / (1 + pow(sin(x), 2));
        }else{
            y = cbrt((pow(x, 2) + sqrt(pow(x, 5) - 1)) / (2 * x + 3));
        }
        out <<"f(" << x << ") = " << y << endl;
    }
}