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
import java.util.*;

class Main{
	
	public static void main(String args[]){

		Scanner src = new Scanner(System.in);

		int a = src.nextInt();

		System.out.println((int)(a+(int)Math.pow(a,2)+(int)Math.pow(a,3)));
	}


}