
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
The correct number(s) of the following statements is/are $\boxed{\text{answer}}$.

(①) The regression effect is characterized by the relevant exponent $R^{2}$. The larger the $R^{2}$, the better the fitting effect.

(②) The properties of a sphere are inferred from the properties of a circle by analogy.

(③) Any two complex numbers cannot be compared in size.

(④) Flowcharts are often used to represent some dynamic processes, usually with a "starting point" and an "ending point".

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