
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
Xiao Ming was solving a math problem: "Given two polynomials A and B, where $B=3a^2-5a-7$, try to calculate $A+2B$." However, he mistakenly treated $A+2B$ as $A-2B$, and the result he got was $-2a^2+3a+6$. Can you help him calculate the correct answer? (Show the calculation process)

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