
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
Among the following groups, _\(M\)_ and _\(P\)_ represent the same set in \_\_\_\_\_\_\_\_ (fill in the serial number).

\(①\)_\(M\)_\(=\{3,-1\}\), _\(P\)_\(=\{(3,-1)\}\);

\(②\)_\(M\)_\(=\{(3,1)\}\), _\(P\)_\(=\{(1,3)\}\);

\(③\)_\(M\)_\(=\{y|y=x^{2}-1, x∈R\}\), _\(P\)_\(=\{a|a=b^{2}-1, b∈R\}\);

\(④\)_\(M\)_\(=\{y|y=x^{2}-1, x∈R\}\), _\(P\)_\(=\{(x,y)|y=x^{2}-1, x∈R\}\).

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