You can insert LaTeX/KaTeX equations into your notes.

This page shows the supported functions and symbols you can display with KaTeX.

Tip: Use an online LaTeX equation editor, such as this one from TutorialsPoint, that lets you visually design your equations before you paste it into Codex.

Inline equations

To insert an in-line equation, type a $ symbol, followed by your LaTeX statement, then another $. The equation should automatically render. You can also click the equation or move your cursor back into it to edit.

Block equations

To insert a block-level equation, go onto a new empty line and type $$ and hit Space Then you can type in your KaTeX formula.