Find $y^{\text{'}}$ by $($a$)$ applying the Product Rule and $($bj multiplying the flactors to produce a sum of simpler terms to differentiate.

$y=(4-x^2)(x^3-3x4)$

Apply the Product Rule. Let $u=(4-x^2)$ and $v=(x^3-3x4).$

$\frac{d}{dx}(w)=(4-x^2),(x^3-3x4)$

$$