Takes one argument that must either be a number or evaluate to a number. Select the table cell where you want your result. Click into the Type equation here box and type the formula.
If you use spaces in your equation like we do in our example below Word may turn your hyphens into dashes which wont work.
This will display a Formula Dialog Box which will suggest a default formula which is SUM LEFT in our case. You can also copy and paste the formula from another Word document Notepad file or other program. After you insert the equation the Equation Tools Design tab opens with symbols and structures that can be added to your equation. If the Draw tab is grayed out so that you cant select a pen go the View tab and select.