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-----
2

-----Sample Output-----
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.

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