Problem:
Score : 100 points

Problem Statement

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.

Sample Input 1

2

Sample Output 1

14

When a = 2, we have a + a^2 + a^3 = 2 + 2^2 + 2^3 = 2 + 4 + 8 = 14.

Print the answer as an input. Outputs such as 14.0 will be judged as incorrect.

Sample Input 2

10

Sample Output 2

1110

Solution in Java (OpenJDK 11.0.6) (judge verdict: Runtime Error)

import java.util.Scanner;

class Main {
    static Scanner scan = new Scanner(System.in);
    public static void main(String[] args) {
        int a = scan.nextInt();
        System.out.println(equationOutput(a));
    }

    private static int equationOutput(int a) {
        int gp =  a * ((int)Math.pow(a, 3) - 1) / (a - 1);
        return gp;
    }
}