
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 the roots of the cubic equation $x^3 - 6x^2 + 11x - 6 = 0$ be $p$, $q$, and $r$. Compute the expression $p^3 + q^3 + r^3 - 3pqr$.
A) 18
B) 15
C) 21
D) 9
E) 12

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