The Flat World Knowledge website uses MathJax to render and display math elements on the web. If you RIGHT CLICK a math object you will be presented with a number of options.
Choose Math Settings >> Zoom Trigger >> Double-Click
After doing this, you will be able to double click on a math element and it will zoom to 200% (or whichever zoom factor you choose.)
Click the zoomed in picture and it will go away and you can continue reading.