
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:<br/>$(1)-20+\left(-14\right)-\left(-18\right)-13$;<br/>$(2)(-2)×3+(-5)-4÷(-\frac{1}{2})$;<br/>$(3)(-\frac{3}{8}-\frac{1}{6}+\frac{3}{4})×(-24)$;<br/>$(4)-81\div \frac{9}{4}\times |-\frac{4}{9}|-\left(-3\right)^{3}\div 27$.

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