Comment by gommm

I tend to find that for things like this that are really math heavy, it's usually better to create a DSL (or create easily readable function calls, etc) that you can easily write yourself instead of relying on AI to understand math heavy rules. Bonus points, if the rules are in an easily editable format, you can change them easily when they need to. It seems that was the path the author took...

And yes this kind of use-case is exactly where unit tests shine...