
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 the function $f(x)$ defined on $\mathbb{R}$ is an odd function and satisfies $f(\frac{3}{2} - x) = f(x)$, $f(-2) = -3$, and the sequence ${a_n}$ satisfies $a_1 = -1$, and $\frac{S_n}{n} = 2 \times \frac{a_n}{n} + 1$ (where $S_n$ is the sum of the first $n$ terms of ${a_n}$), find $f(a_5) + f(a_6) = \_\_\_\_\_\_$.

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