
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 first, then evaluate:<br/>$(1)\left(3x+1\right)\left(2x-3\right)-\left(6x-5\right)\left(x-4\right)$, where $x=-2$;<br/>$(2)\left(2x-y\right)\left(x+y\right)-2x\left(-2x+3y\right)+6x(-x-\frac{5}{2}y)$, where $x=1$ and $y=2$.

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