The function is of the form

f$($x$)=$ g$($h$($x$)).$

Use non$-$identity functions for g$($x$)$ and h$($x$).)$

f$($x$)=4$ln$($x$)$

$\{$g$($x$),$ h$($x$)\}$

$=$

$4,$ ln$($x$)$

f$\text{'}($x$)$

$=$