I'm on pace to take Differential Equations and Signals & Systems I (EE course) simultaneously in the 4th semester; the course catalog says that it is highly recommended that I take Diff. Eq. prior to Signals & Systems I. So, if I switch Diff. Eq. with a literature course (which I can take anytime later), I would be taking Calculus III, Linear Algebra, and Diff Eq in the same semester. Would it be a bad idea to take those three math courses simultaneously in one semester, in terms of pre-req requirements?