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