
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
Given a function $f(x)$ and its derivative $f'(x)$, if there exists $x_{0}$ such that $f(x_{0})=f'(x_{0})$, then $x_{0}$ is called a "clever value point" of $f(x)$. Among the following functions, those that have a "clever value point" are \_\_\_\_\_\_ (fill in the correct serial number).

- ① $f(x)=x^{2}$,
- ② $f(x)=e^{-x}$,
- ③ $f(x)=\ln x$,
- ④ $f(x)=\tan x$,
- ⑤ $f(x)=x+ \frac {1}{x}$.

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