
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. $(-4) - (+13) + (-5) - (-9) + 7$;
2. $6\frac{1}{4} - 3.3 - (-6) - (-3\frac{3}{4}) + 4 + 3.3$;
3. $-81 ÷ (-2\frac{1}{4}) × \frac{4}{9} ÷ (-16)$;
4. $(-24) × (1\frac{3}{8} + 2\frac{1}{3} - 0.75)$.

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