Word 2007 Add-in : Microsoft Math

The Microsoft Math Add-in for Microsoft Office Word 2007 makes it easy to create graphs, perform calculations, and solve for variables with equations created in Word.

The Microsoft Math Add-in adds computational and graphing capabilities to the Equation Tools Ribbon of Word 2007.

With the Microsoft Math Add-in for Word 2007, you can:

• Plot a function, equation, or inequality in 2-D or 3-D
• Solve an equation or inequality
• Calculate a numerical result
• Simplify an algebraic expression

It'll be very useful for those working with equations and plotting graphs in 2D and 3D and thus creating and inserting the graph directly in Word.
One has to get Microsoft Math to use the Calculate Option.
Microsoft .NET Framework 2.0 is also required.
You can download it from here.