Has the ability to manipulate inverse functions disappeared from WolframAlpha?
Last week I was able to enter f(g^(-1)(x)), and take derivatives wrt x. WolframAlpha now just recognises g as a variable, and will not allow me to use it as an inverse.
In Mathematica I can perform the equivalent:
h[x_] = g[InverseFunction[f][x] ]
without any difficulties. I've also tried this form in Alpha, with no luck.