This creates an Live Math Mode in OneNote for typing in mathematical equations with standard Latex Math syntax.
When you are in OneNote you can use this Autohotkey Script to automatically replace Latex Math Mode Commands with there corrosponding Unicode Symbol.
To start, simlpy execute the MathUnicode.ahk file. Now you are ready to start typing mathematical equations.
You can find supported symbols/commands in the symbol_list.txt file. Use '_' to switch into writing subscript text and use ^^ to switch into writing superscript text.
You can go back into normal text mode by repeating the character.