TeX already has the primitive of {}\over{} that does what you are saying. It is not typically used. https://tex.stackexchange.com/questions/73822/what-is-the-d

TeX already has the primitive of {}\over{} that does what you are saying. It is not typically used. https://tex.stackexchange.com/questions/73822/what-is-the-difference-between-over-and-frac https://tex.stackexchange.com/questions/73822/what-is-the-di...