C#: Enter value x from keyboard. Calculate the value of y by the formula

Enter value x (float) from keyboard. Calculate the value of y by the formula:

Source code:
namespace Example1

{

    class Program

    {

        static void Main()

        {

            double x, y;

            Console.WriteLine("Input x: ");

            x = int.Parse(Console.ReadLine());

            y=(x*x*x + Math.Sqrt(x))/(x*x + 1 + Math.Sin(x));

            Console.WriteLine(y);

            Console.ReadLine();

        }

    }

}