I think one example is that both sin(x) and sin x are valid notation and common to use, and so a function doesn’t seem to be quite right, at least not if we want to allow the markup to mimic the math notation closely.
I think one example is that both sin(x) and sin x are valid notation and common to use, and so a function doesn’t seem to be quite right, at least not if we want to allow the markup to mimic the math notation closely.