#include <math.h>

#include "stdafx.h"

#include <iostream>

using namespace std;

int main()

{

double x;

cout << "Enter the argument: " << endl;

cin >> x;

double res = cosl(x) - tanl(3 * x) / logl(x);

printf("Result: %.20Lf\n", res);

system("pause");

   return 0;

}