We can use the product rule to differentiate the function.
$$ \frac{d}{dx} \left( x=(0.5xy+3)(3+x^2) \right) $$
Using the product rule, we have:
$$ \frac{d}{dx} \left(0.5xy+3\right) \cdot (3+x^2) + (0.5xy+3) \cdot \frac{d}{dx} \left(3+x^2\right)
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