Type Mathematical Formulas with Ease Using LyX
LyX is an open-source document processor which runs on Mac, Windows and Linux. They called it a “document processor” simply because unlike most word processors, it encourages an approach to writing based on the structure of the document rather than the appearance. This means that you do not have to worry about the appearance of your document because the software will handle the details for visual layouts.
The software is free with no strings attached. Using LyX for typing regular notes and letters is as easy as using your favorite word processor. The main feature of the software is its ability to produce complex equations with ease while providing a professional look for the created document. It takes a little time to get used to and to learn the commands for the software, but once you get the hang of LyX, you can turn LyX into a very useful document tool. You can check out their video demo here.
LyX is a great alternative for your usual word processor and a great tool for creating documents that contains simple and complex equations. It is light and does not eat up a lot of memory and you can download it for free.