#include <iostream>
#include <math.h>
using namespace std;

int main()
{
  float x,b,a,y=0.02;
  cout << "Enter x: ";
  cin >> x;
  cout << "Enter b: ";
  cin >> b;
  cout << "Enter a: ";
  cin >> a;
  float res = (sin(2*x-b*b)-7*a*y*y)/(pow(x,4)+1) - (sqrt(cos(y)-5*pow(y,6)))/(6-cos(y));
  cout << res;
}