It sounds like you're looking for a software solution that supports Mathematical Markup Language (MathML) functionality beyond what you currently have. Here are a few options you can consider: 1. Microsoft Office 2007: While you mentioned that you have it installed on your XP partition, you might want to explore the possibility of running it in a compatibility mode on Windows 7. This may allow you to access the MathML features you need. 2. Internet Explorer 9: Another option is using Internet Explorer 9, which has built-in MathML support. However, it's worth noting that this is an older version of the browser. 3. TeXworks: TeXworks is a free and open-source software for composing and editing mathematical content...