
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Calculate the sum of the series where each term is given by $n \left( 1 - \frac{1}{n^2} \right)$ for $n$ ranging from 2 to 15.
A) 115
B) 118
C) 119
D) 120
E) 121

Present the answer in LaTex format: \boxed{Your answer}
user