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 s=new Scanner(System.in);
	    int a=s.nextInt();
        int sum=a+a*a+a*a*a;
        System.out.println(sum);
	}}
