<p>Hey, I was interested in possibly taking diff eq this summer at BU in order to get a head start on college. However, I only know calc 1 and 2 (from AP calc BC) and havent taken calc 3, witch at BU is a prereq for diff eq. However, I know that at other colleges, calc 3 is not a prereq for diff eq. At BU, is it feasable to take diff eq before calc 3? If not, would it be possible to take diff eq if I take calc 3 concurrently?</p>