
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
Calculate \((2 \nabla 3) \nabla (4 \nabla 5)\) given that for any \(a > 0\) and \(b > 0,\) the operation \(\nabla\) is defined as:
$$a \nabla b = \frac{a + b}{1 + ab}.$$

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