Word 2016 for Mac includes equations that you can drop into your document—no formatting required. If the built-in equations don’t meet your needs, you can modify them or build your own sophisticated equation from scratch.
Insert a built-in equation
In your document, click where you want to insert an equation.
On the Insert tab, click the arrow next to Equation, scroll through the options in the list, and then click the equation you want.
The equation is inserted in your document.
Write or change an equation
On the Insert tab, click Equation.
A placeholder for your new equation is inserted, and you’ll see a set of tools on the Equation tab for customizing and adding various elements to your equation.
To insert a symbol, click a symbol in the Symbols group. You'll find several math-related symbols to choose from.
Note: If you don't see the group titles on the Equation tab, click Word > Preferences, and then in the Word Preferences dialog box, click View. Select Show group titles at the bottom of the dialog box.
To see all the symbols, rest your mouse over one of the symbols, and then click the arrow that appears below the symbol gallery. Scroll to see all of the available symbols.
To insert a structure, click a structure in the Structures group, and then replace the placeholders—the small dotted-line boxes—with your own values.
Select how the equation is displayed on the page by clicking an option in the Tools group.
The Professional option displays the equation as a two-dimensional value. The Linear option displays the equation so it fits on one line.
To edit a mathematical equation, click in the equation to make the changes you want. When you do, Word displays the Equation tab.