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 sc = new Scanner(System.in); 
int a = sc.nextInt(); 
long total = a+(a*a)+(a*a*a);   
System.out.print(total);
}
}
