Write the composite function in the form $f(g(x)).[$Jentify the inner function $(g)$ and SCalctT$93\mathrm{.}4\mathrm{.}005,y=f(u)-1($Use non$-$identity functions for $f(u)$ and $g(x).)$

$x=e^{9\sqrt[\phantom{2}]{x}}$

$(f(u),g(x))=()$

Find the derivative $\frac{dy}{dx}.$

$\frac{dy}{dx}=$

$$