Searching for a "registration key" for MathType 5.2 often leads to untrustworthy sites that may bundle malware with their downloads. MathType is a professional equation editor currently developed and sold by Wiris .
Many "reports" or "key generators" for older software versions like MathType 5.2 are actually mathtype 52 registration key top
MathType 5.2 Registration Key: Complete Guide to Activating Your Equation Editor Searching for a "registration key" for MathType 5