#include <iostream>
#include <cmath>

using namespace std;

int main()
{
	float a, b, x, y;

	cout << "Enter four numbers (A B X Y): ";
	cin >> a >> b >> x >> y;

	cout << "sqrt(abs(A-B)) = " << sqrt(fabs(a-b)) << endl;

	cout << "X^-cos(Y) = " << pow(x, -(cos(y))) << endl;
}