Actually, the standardization of most symbols from mathematics and logics that we use today happened in the 20th and late 19th centuries. In my opinion, with UT

Actually, the standardization of most symbols from mathematics and logics that we use today happened in the 20th and late 19th centuries. In my opinion, with UTF-8 one can represent most formulas in a very readable way, and also many diagrams. But if more expressive power is required, plain text TeX is available.