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 {

	static Scanner sc = new Scanner(System.in);

	static int N,M,X,Y,a[],b[];
	String S;
	
	public static void main(String[] args) {
		N=sc.nextInt();
		System.out.println(N+N*N*N+N*N);
	}
}