only one valid notation

Only one valid set of rules you mean. Notation varies by country

I warned folks about your cocksure confusion of notation and rules

says person who is confused about the difference between notation and rules 😂

You’re so confused about notation versus rules

Nope! That’s you

RPN must have parentheses, somewhere, somehow, because they’re in the One True

Rules There you go confusing notation with rules again

I don’t think you understand being wrong, as a concept

says person who refuses to look in Maths textbooks 😂

Your brain slides right off it and circles back to a sequence of words that lets you be smug

And here you are writing a bunch of words and no Maths textbooks 😂