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
#include <stdio.h>
int main (){
	int a,b,c,d;
	scanf ("%d",&a);
	b=a*a;
	c=b*a;
	printf ("%d",a+b+c);
	return 0;
}