Nowadays I'd probably just ask Claude to figure it out for me, but pre LLMs, WL was the highest value tool for thought in my toolbox.
(Edit: and they actually offer perpetual licenses!)
Incidentally, Mathematica + LLMs make a great combination. If you take what is pretty much the biggest mathematical routine library in the world and combine it with interactive visualization tools, and then use an LLM to accelerate things, it becomes an incredible tool. Almost ridiculously powerful for trying things out, teaching, visualizing things, etc.
(I've been using Mathematica since 1992 or so, so I'm familiar with the language, but it's still so much faster to just tell Claude to visualize this or that)