`: For simple inline math notation, non-TeX notation looks good if certain convetions are followed: italicize variables, but not digits and not punctuation; put spaces before and after ``+`` and ``=`` and ``>`` and the like (non-breakable ``nbsp`` spaces if line-breaks would upset legibility), use proper minus signs rather than stubby little hyphens (5 − 3, not 5 - 3), and a few other things.  For ``displayed`` rather than inline notation, I use TeX and it looks good.  When TeX is inline rather than displayed, it often gets badly misaligned or is the wrong size-comically so.  Mixing TeX with non-TeX notation on the same line often looks terrible.    `