Given an integer a as input, print the value a + a^2 + a^3.

Constraints

* 1 \leq a \leq 10
* a is an integer.

Input

Input is given from Standard Input in the following format:


a


Output

Print the value a + a^2 + a^3 as an integer.

Examples

Input

2


Output

14


Input

10


Output

1110
//package hiougyf;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		 Scanner sc =new Scanner(System.in);
		 int t=sc.nextInt();
		   int ans=t+(t*t)+(t*t*t);
		   System.out.println(ans);
		}
}
