I'm adding to my list of notation ambiguities, for students entering maths into a computer. Suggestions please!
e.g. is 'x(x+1)' a product?
In reply to @christianp
A naive parser could interpret 'x(x+1)' as 'x of x+1', and require 'x*(x+1)' for the product. But students will write x(x+1) to mean product