As a physicist, I often have unhandy expressions and do manipulations on them. One such example is the following:
The only thing that has really changed are that the
\gamma^0 from the outside moved into the square bracket. Everything else is the same.
I would like to aid the reader (in this case my tutor) by highlighting the changed parts of the equation. For this I thought about coloring the changed parts in a dark blue or dark green. Or alternatively I could try to typeset everything else in gray to make the changed parts pop out.
Is anything like that even sensible? Most people just hand in their homework with formulas hand-written on a sheet of paper without any text in between. Would any sort of highlighting actually help or be more distracting?