Given $f(x)=3 x^{2}-2 x-6$ And $g(x)=3 x+5$ , Find Each of the Following

Essay

Given $f(x)=3 x^{2}-2 x-6$ and $g(x)=3 x+5$ , find each of the following. Simplify the expression when possible.
(a) $(f-g)(x)$
(b) $\frac{f}{g}(x)$
(c) the domain of $\frac{f}{g}$
(d) $(f \circ g)(x)$
(e) $\frac{f(x+h)-f(x)}{h}(h \neq 0)$