Electromagnetism just got weird. REALLY weird. Everything was going great until we hit this new chapter on separation of variables. I don't remember doing this kind of stuff in my DiffEqs class. Frankly, I'm feeling overwhelmed. I have a midterm at the end of this week, and I feel as though if I were to be tested on boundary conditions of electric potentials, then I'm doomed for sure. Multipole expansions make more sense to me and seem far, far less hand-wavey than separation of variables does. Is there a better way of understanding separation of variables than all this wacky math stuff? This n and m business combined with double summations is getting out of hand. Fast.