Answer
$f(g(hx)))= \mid2^{\sqrt x}-4\mid$
Work Step by Step
We need to find $f(g(h(x)))$. To do this we can first substitute g(x) into our f(x) equation. $f(g(x))= \mid2^{x}-4\mid$. Next, we can further substitute in h(x) into our previous function to create $f(g(hx)))= \mid2^{\sqrt x}-4\mid$.