
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
(In the 2016 National Exam) Let $f(x)$ be an even function. For $x \leq 0$, $f(x) = e^{-x - 1} - x$. Determine the equation of the tangent line to the curve $y = f(x)$ at the point $(1, 2)$.

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