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.Scanner;


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