There was an interesting paper on how the newer equation editor handles math using just Unicode math symbols: https://www.unicode.org/notes/tn28/UTN28-PlainText

There was an interesting paper on how the newer equation editor handles math using just Unicode math symbols: https://www.unicode.org/notes/tn28/UTN28-PlainTextMath-v3.1.pdf https://www.unicode.org/notes/tn28/UTN28-PlainTextMath-v3.1....