Order of operations in arithmetic is like grammar in language. See how many people think conventions have nothing to do with the expression of thought - as if rules somehow stifle the possibility of actually getting their point across, or misuse is somehow more creative.

It is easy to see, in a simple equation, the resulting confusion. A careful mathematician would avoid writing something like that without specifying the protocols.

Imagine a course in Creative Accounting. The goal, of course, would not be self expression.
It would be to create profit.