Difference between Penn Custom Edition Calc Txtbook and Regular Edition

<p>What's the difference? Problems different? Or is it just a software CD added to it or something?
Talking about Thomas' Calc. Early Trans. 12th E.</p>

<p>I don’t think there’s much of a difference…the custom edition just has practice exams for 103, 104, and 114 at the end (which can also be found online so it’s completely redundant). I would only buy the custom edition if your prof actually collects/grades hw; I’m not completely sure but I think some of the problem numbers might be different so that could complicate things if you have to turn in certain assigned hw problems.</p>