The identified formula will show at the top. It is easy to insert and use formulas. In a Word table.
To add a formula into the Word table see How to calculate formulas in a Word document if you need to use formulas without tables do the following.
You can use simple formulas in Microsoft Word such as addition subtraction - multiplication or division. Typing the formula that you want to use in the formula box. If you need to use an equation add or write it in Word. In a document body.