Hi @jedsmith,
It turned out to be straightforward to solve the “Power( p )” function for the y=1 intersection.
I’ve implemented the functionality here:
https://www.desmos.com/calculator/zifabox6lr
You can tweak the threshold (t), the point that the graph must pass through (x0,y0), and the power ( p ).
I couldn’t see a simple means of solving for the tanh and arctan functions.