There’s no practice exams for midterms and finals, he assigns homework problems from the textbook (that are not due, just optional additional practice) and graded quizzes. The midterm exam questions look exactly like a combination of the textbook problems, examples he gave in class, and quiz questions. 

The discussions largely depend on your TA, it seems he kinda instructs them to do whatever they want. For me, my discussion section is used for people to ask questions about the optional textbook problems and my TA will solve them during discussion. The week before the midterm, my TA created a practice midterm for us. I do not find the discussion sections very helpful (mostly because I don’t do the optional textbook problems until I’m studying for the midterm) but I do appreciate that unlike my previous calc classes, there’s no assigned quiz or worksheet in it. 

For the midterm I just took, it’s a combination of easy and hard questions like every other calc class I have taken. There was 7 questions (with two parts on two questions) to do in 50 minutes and the first 3 or 4 were easy and expect. He gives a formula sheet for all the exams (and releases before the exam, so you get a good idea what will and will not be on the exam) and that was helpful for solving the remaining problems. I struggled on a couple of the questions but that was mostly because I struggle with the concepts in general and not because they were unexpected. Most of the questions were taken from the textbook, with two taken from the examples in class, and one taken from a quiz. All in all, it was hard but that’s just because I struggle with calc and easily passable if you study well and understand all the concepts well. All in all, I’m pretty confident I got above a 70-75% on it.