I wrote a final exam in a course, in which the professor said that he would not test our memory and give all the needed formulae, so I didn't concentrate on memorizing them.
Would it be appropriate to politely send the professor an email with some feedback / opinion about this situation? And if this would be appropriate, what would be the best way to express this opinion as neutrally and politely as possible? So that the professor wouldn't think that I'm mad at him or something like that.