
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
Let \( P \) be a fourth degree polynomial, with derivative \( P' \), such that \( P(1) = P(3) = P(5) = P'(7) = 0 \). Find the real number \( x \neq 1, 3, 5 \) such that \( P(x) = 0 \).

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