
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 that $f(x)$ is an even function that is differentiable, and $$\lim_{x\rightarrow 0} \frac {f(2+x)-f(2)}{2x}=-1$$, then the equation of the tangent line to the curve $y=f(x)$ at the point $(-2, 1)$ is __________.

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