
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
Calculate:  
(1) $(\frac{a^{2}b}{-c})^{3}•(\frac{c^{2}}{-ab})^{2}÷(\frac{bc}{a})^{4}$;  
(2) $(\frac{2}{{{a^2}-{b^2}}}-\frac{1}{{{a^2}-ab}})÷\frac{a}{{a+b}}$.

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