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

inputFormat

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

outputFormat

Output

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

Examples

Input

2

Output

14

Input

10

Output

1110

样例

2

14