What do you mean by "Medieval math notation"? Wasn't it mostly just textual descriptions? (which arguably would not be too far away from the natural language being used to interact with LLMs)

It wasn't until Thomas Harriot's _Artis Analyticae Praxis_ was published that one got anything resembling consistent math notation as folks today would expect, and isn't the symbology used for APL just a formalization and/or extension of prevailing math symbol usage? (which was the point of the whole thing?)