
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
Define a new operation "$\otimes$", with the rule: $a\otimes b=\left(a+b\right)\left(a-b\right)$. For example, $3\otimes 1=\left(3+1\right)\left(3-1\right)=8$. Find the value of $4\otimes \left[2\otimes \left(-1\right)\right]$.

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