Let's start with part (a) using the Product Rule.
The Product Rule states that if $y = u(x)v(x)$, then $y' = u'(x)v(x) + u(x)v'(x)$.
In our case, $u(x) = 6x^2 + 5$ and $v(x) = 3x + 8 + \frac{9}{x}$.
First, find the derivatives of u(x) and v(x).
$u'(x) =
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