Problem Statement

Given an integer a as input, print the value a + a^2 + a^3.

Input

Input is given from Standard Input in the following format:
a

Output

Print the value a + a^2 + a^3 as an integer.

Constraints

• $1 \leq a \leq 10$
• a is 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

见题面 Input 部分

见题面 Output 部分