\left can be a hassle, but the distinction between \frac and / is often quite useful. In inline math something like x/y can be a lot more readable than \frac xy

\left can be a hassle, but the distinction between \frac and / is often quite useful. In inline math something like x/y can be a lot more readable than \frac xy. You might say it should just automatically choose, but often some terms are more important than others and I really want to control which get rendered more compact. I also don't like how parentheses in asciimath sometimes don't get rendered.