Equations in Word 2007 or 2010
The process for inserting an equation in Word 2007 or Word 2010 is quite simple. Go to the Insert tab and click Equation in the Symbols group. Here you will find several options.
You can choose from a built-in equation, which you can then edit to your needs. You can select more equations from Office Online. You can also select Insert New Equation to insert your own custom equation.
Once you have made a selection from the Insert Equation menu, the Equation Tools Design tab will appear, providing several tools, symbols and structures that you can use.
If you wish to add your equation to the list of frequently used equations, select the equation you created. Go to the Equation Tools Design tab and select Equation in the Tools group. Click Save Selection to Equation Gallery. Type a name for the equation in the Create New Building Block dialog box. Select Equations in the Gallery list, add a description or other options if desired and click OK. The new equation will be included with the built-in equations in the Insert Equation menu.
For a comprehensive tutorial on creating equations in Word 2007, read Using Word 2007’s Equation Editor. The steps in this tutorial work for Word 2010, as well.