
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 the function $y= \sqrt {3}\sin (x- \frac {π}{6})+\cos (x- \frac {π}{6})$, if we first stretch the horizontal coordinate of each point on the graph to twice its original length without changing the vertical coordinate, and then shift the resulting graph $\frac {π}{6}$ units to the left, determine the equation of one symmetric axis of the resulting function graph.

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