If you are looking for an "interesting" way to handle equations without the cost of a MathType license, researchers often turn to open-source alternatives:
A massive library of symbols and templates that allows you to build equations visually. mathtype 7.4.8.0 product key
MathType, developed by Wiris, is proprietary software. It is not free software, and its use is governed by a strict End-User License Agreement (EULA). If you are looking for an "interesting" way