
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
Factorize the expression \(x^4 + 324\).
**A)** \(x^4 + 324\) is prime
**B)** \( (x^2 - 18x + 162)(x^2 + 18x + 162) \)
**C)** \( (x^2 - 18x - 162)(x^2 + 18x - 162) \)
**D)** \( ((x - 9)^2)^2 \)

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