p02621 AtCoder Beginner Contest 172 - Calc
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
```python
a= int(input())
eq= a+(a**2)+(a**3)
print(eq)
```