
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/>$(1)-9+5-\left(-12\right)+\left(-3\right)$;<br/>Calculate:<br/>$(2)-(+1.5)-(-4\frac{1}{4})+3.75-(-8\frac{1}{2})$;<br/>$(3)$Read the following solution process and answer the question:<br/>Calculate:$\left(-15\right)\div (-\frac{1}{2}×\frac{25}{3}$）$÷\frac{1}{6}$<br/>Solution: Original expression $=\left(-15\right)\div (-\frac{25}{6})\times 6(Step 1)$<br/>$=\left(-15\right)\div \left(-25\right)(Step 2)$<br/>$=\frac{3}{5}$(Step 3)<br/>①The error in the solution process above starts from step ______, and the reason for the error is ______;<br/>②Please write down the correct solution process.

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