Practice problem sets and solutions to midterm exams are (usually) posted in two formats: as downloadable PDF files, and as XHTML+MathML pages. XHTML is the new standard for the HyperText Markup Language. It replaces the old HTML, and it has more capabilities. For example, XHTML+MathML is an extension that allows you to view inline math on the web within your browser window without the aid of images. So mathematical objects will flow and scale just like any other element in the web page.
To view XHTML+MathML you just need an up-to-date browser:
- Firefox: all platforms
- The full the Mozilla family: all platforms.
- Support for Internet Explorer with the free MathPlayer plugin: Windows only.
More details, tips, and instructions are available here.
A tour of the Mozilla Foundation's MathML Project should give you a better idea, especially the MathML Torture Test.
To print out the solutions, you will get the best results by downloading the PDF instead.