
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
If a series of functions have the same analytical expression and range, but different domains, these functions are called "homologous functions." For example, the function $y=x^2$, $x\in[1,2]$ and $y=x^2$, $x\in[-2,-1]$ are considered "homologous functions." Among the following six functions: ①$y=\tan x$; ②$y=\cos x$; ③$y=x^3$; ④$y=2^x$; ⑤$y=\lg x$; ⑥$y=x^4$. Those that can be used to construct "homologous functions" are.

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