[(C n A) – (B – A)] n C

Sorry it's kind of sloppy, I didn't know what to use for the symbols.

The (B – A) part has a line over it so I suppose that'd mean the complement of B – A.

The book shows a totally empty Venn Diagram with no shading. I worked out the problem, or at least thought I had, only to find that I was wrong. Why is nothing shaded?