
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 and then evaluate the following expressions:

1. $(1)(a+3)^{2}+(3+a)(3-a)$, where $a=-1$
2. $(x-2y)(x+2y)-(x+2y)^{2}+8y^{2}$, where $x=2$, $y=3$.

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