
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
Simplify the expressions first and then evaluate:
(1) $-3y^2 - 6y + 2y^2 + 5y$, where $y=2$;
(2) $15a^2 [-4a^2 + (6a - a^2) - 3a]$, where $a=-2$;
(3) $(3xy + 10y) + [5x - (2xy + 2y - 3x)]$, where $xy=2$ and $x+y=3$.

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