Use Insert / Equation and use Word’s Equation editor to build an expression, which will be stored in the document as OOML. This works well for many expressions, but some people prefer other methods.
If you are familiar with LaTex then you can use this to enter math expressions. Use Insert / Equation / Insert new equation. In the Conversions group on the ribbon ensure that LaTex is selected. Enter your LaTex expression and it will be converted and stored in the document in Word’s OOML format.
This page will explain how to create accessible math equations in MS Word
There is a new way to insert accessible math equations into a Word Document using Mathpix.
You can download the app here.
Create a place holder in the text of your word document for where you will later insert your accessible equations. We recommend using three asterisks
Once you are ready to create your equations, you can snip and insert them using the Mathpix app.
ctrl+cmmd+mor you can select the snip icon in the top left corner of the app.