using System;
public class Program
{
public static void Main()
int x = 0;
double res;
Console.WriteLine("X>");
x = Convert.ToInt32(Console.ReadLine());
res = (Math.Pow(x,2) - 7*x + 10)/(Math.Pow(x,2) - 8*x + 12);
Console.WriteLine("Result="+res);
Console.ReadLine();
}