Eric S. answered 10/27/20
Experienced High School Physical Sciences Teacher and Tutor
Microsoft has a built in equation editor or you can use a LaTeX editor and copy and paste in the results.
If you want to type math formulas in using LaTeX text rather than visually through mouse clicks you will have to find an Add-On. I used to use MathType, but when I updated computers I lost all of the formulas I had done because the old and new versions of Office and/or MathType weren't compatible.