int main()
{
double x,a,b,c,d,y;
cin >> x;
a=x*x;
b=a*a;
c=a+b;
d=b+1;
y=c/d;
cout << y;
system("pause");
return 0;
}
int main()
{
double x,a,b,c,d,y;
cin >> x;
a=x*x;
b=a*a;
c=a+b;
d=b+1;
y=c/d;
cout << y;
system("pause");
return 0;
}