Was given the equations f(x)=x^3+3x+7 g(x)=tan(x^2+1)
Need to use maple to differentiate each of the following...
A. f(x) * g(x)
B. f(x)/g(x)
C. f( g(x) ) entered as f@g
D. g( f(x) )

How do i differentiate these, normally for its just D(f) but i tried D(f@g), D(f * g) but it doesnt look right. Please help!
THanks