
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
A group of expressions arranged according to a rule: $a^{2}$, $\frac{{a}^{4}}{3}$, $\frac{{a}^{6}}{5}$, $\frac{{a}^{8}}{7}$, $\ldots$, then the $8$th expression is ______.

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