Short description of Rapid-Pi 2.1: Rapid-Pi is an add-on for Microsoft Word (and other word processors) that will transform the way you enter mathematical formulae, equations and expressions into documents.
Rapid-Pi was designed with a single purpose in mind - to save you time when editing math in documents. Rapid-Pi allows you to enter mathematical expressions as easy-to-understand text. For example, to create a fraction you can just type "2/3".