Well in my case here ,I just have to memorize a formula to pass a CLEP test I’ll take at some point for some early level college mathematics.
I’m terrible at memorizing things that aren’t interesting; I did my investing once upon a time when I actually _used_ these formulas on a regular basis.
But memorizing them at this point has been torture. It’s good practice though. I think I’ll use this technique again; just talk my way through it, starting at one part and working my way through ’til I catch it all in a Q&A way.