a mystery function $\displaystyle L: (0,\infty) \rightarrow \mathbb{R}$ and you are told that

L'(x)=1/x for all x > 0:

Use this to compute the derivatives of the following functions:

(a) f(x) = L(2x + 3) when x > 0;

(b) g(x) = (L(x2))3 when x > 0;

(c) h(x) = L(L(x)) when L(x) > 0 and x > 0.

Make sure you justify all your steps.

Can anyone please help me with this question?