Question

given that f, g, and h are differentiable functions f(g(h(x))) = x what is h'(x) in terms of f, g, f', g', and h'?

I plugged in equations on my own like

h(x)= x^4
g(x) = 4th root of x
f(x)= x^2

i need more assistance on how to proceed thnx