I wrote my differential equations exam Friday, and have since found myself in an awkward position. My school is small, so engineering physics and math all share the same class, and this year we had a really strong class. I was pulling along in the mid-70's, but that was due to a very bad quiz at the beginning of the year I thought the exam would replace. However, the professor's exam this year...it was unexpected. All of the coursework we'd done and the quizzes he'd shown us weren't particularly computationally intensive. The exams from previous years were light, I wrote both of them, neither took me much more than 2 hours and judging by the solutions I could ace them. This final was pretty balls-to-the-wall for 3 hours, however, with a few integrals that I would've taken a sheet of paper to solve without having to work out variation of parameters to get there. Most of the students were pretty upset with the final, and the professor probably overheard some colourful language when people were discussing it. The professor is generally very popular(perhaps not right now), and a friendly guy. Does anyone have relevant experience on how to handle this situation?