To install and activate MathType build 7480 (or the latest version), the user should follow these official channels:
If you are upgrading from an older version (like MathType 6.9), you may need to uninstall the old version and clear the registry before the new key will register correctly.
MathType offers a 30-day free trial. During this time, you have full access to all features without needing to enter a product key. How to Install MathType 7.4.8
During installation, the software will automatically detect compatible versions of Microsoft Word and PowerPoint to install the MathType add-in.