#include
#include
using namespace std;
int main()
{
double x, y, z, t;
cout << "Enter x: ";
cin >> x;
cout << "Enter y: ";
cin >> y;
cout << "Enter z: ";
cin >> z;
t = ((1 + pow(sin(x + y), 2)) / abs(x - (2 * y) / (1 + pow(x, 2) * pow(y, 2)))) * pow(x, abs(y)) + pow(cos(atan(1/z)), 2);
cout << t;
}
Вроде так)