Not sure if I'm re-inventing the wheel, but honouring BB's request, I've attached the shader Matmatic makes. Be sure to remove the .txt, of course.

And the screenshot:

... which is sort of pointless, I guess, really. The formula's easier and so is the mt5.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks