On the Table Tools Layout tab click the Formula button. How to add an equation in your document see Working with Microsoft Equation. This three group contains.
A menu in the ribbon then pops up that allows you to insert everything from basic math.
Step 3 The Formula dialog box by default contains the formula Sum LEFT. If you were to simply click OK you will see the value we are looking for in the cell 30. Click the icon to insert an. Select Insert to bring your equation into the file.