MathType 7.4.8.0 is a specific version of the software. If you're looking for a product key, I recommend checking the official Wolters Kluwer website or contacting their customer support directly. They can provide you with the necessary information or guide you through the process of obtaining a valid product key.
Many universities provide licenses for students and faculty. You can check with your institution's IT department or the MSU Digital Accessibility guide to see if you have access through your school. Risks of Using "Free" Product Keys mathtype 7.4.8.0 product key
A: A standard single‑user license permits installation on multiple personal devices (e.g., a laptop and a desktop) but only one instance may be used at a time. Institutional licenses have different terms; always check the license agreement. MathType 7