Guess what? You can work on your MathLAN account remotely using a browser:

Go to karp.cs.grinnell.edu

Log in

Click Launch Session

In the pop up window, click on XFCE and then Launch

Another tab will open up that will look like a desktop on a MathLAN computer

Note: It is annoying to impossible to copy and paste from the MathLAN window into anything on your own machine, so be thoughtful about where you type things and the potential need to re-type them or share them another way.