Working with Microsoft Equation

To open the Microsoft Equation, do one of the following:

• Choose Insert -> Object... tab to open the Object dialog box:
  
  
  Choose Microsoft Equation 3.0 from the Object type list, and click OK.
• Click the Microsoft Equation   button in the toolbar.
• If you have any equation in your document, double-click in it.
• Select any equation in your document and press Alt+Shift+F9.

The Equation Editor opens:

Equation Editor Toolbar contains dozens of equation templates. Within each button on the toolbar, there are several tools available. Simply click on a button to see the tools contained in each. How to create an equation step-by step, see:

• Normal or Gaussian distribution in tip How to insert an equation with fractions, square roots and exponents:
  
• Gauss's law, also known as Gauss's flux theorem in tip How to insert an equation with integral:
  
• Electromagnetic tensor in tip How to insert an equation with matrix:
  

For more details about equations see Setting font size and styles in an equation and Adjusting spacing and alignment in an equation.

You can also use the keyboard to move around in an equation, for more details see Keystrokes for Moving the Cursor within an Equation.

Note: To use external to word, you can use the executable path: "C:\Program Files\Common Files\Microsoft Shared\Equation\EQNEDT32.EXE"
You can create a shortcut for this and placed it on the desktop.