Edit equation easily in Latex

Inseting equation in Latex is really a pain, especially when you insert some long equations consisting of a wide range of symbols.

It would be easier if you have Mathtype: change the output format to Latex, copy the equation in Mathtype, then paste it into Latex file. However, we all know, this software is extremely expensive, it is not affordable for students in developing countries, even in developed countries.

Luckily, Mathtype also provides a equation editor for Latex, it is free! The website is at:
http://www.dessci.com/en/products/texaide/.

Tips:

1. Mathtype usually generates redundant Latex code.
2. If there are words in the equations, you'd better look up the Latex math guide rather than using Mathtype.