
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
Consider the graphs of four functions, labelled (6) through (9), shown below. The domain of function (8) is $$\{-6,-5,-4,-3,-2,-1,0,1,2,3\}$$. Determine the product of the labels of the functions which are invertible. 
- Function (6) is represented by the equation $y = x^3 - 3x$.
- Function (7) is a set of discrete points: $(-6, 4), (-5, 5), (-4, 1), (-3, 0), (-2, -1), (-1, -2), (0, -3), (1, -4), (2, -5), (3, -6)$.
- Function (8) is represented by the equation $y = \tan(x)$.
- Function (9) is represented by the equation $y = 5/x$.

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