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.*;

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