#include
int main()
{ double x = 5;
double y;
y = (1 + x*x*x) / (x*x*x + x*x + x + 1) * 6;
printf("y=%.6f\n",y);
}
float fun( float x )
{
float n ;
n = ( x * x * x + 1 ) / ( x * x * x + x * x + x + 1 ) * 6 ;
return n ;
}
void main()
{
printf( "fun(5)=%.6f", fun(5) ) ;
}