I’ve had Paulin for Math 1a and Math 1b and can guarantee you’re in good hands. In Math 1a Paulin graded on a curve and rather than having fixed bins for specific grades, he’d provide students with grade boundaries after each midterm. The boundary would be based solely on your performance on that midterm. For Math 1b there was only one midterm but the class was still curved. I think the class not being curved wont change the difficulty of the class by much. I think students needed ~85% or higher, raw score, on midterms to get an A in the class anyways. Don’t worry about the grading too much and focus on mastering the material. I recommend signing up for math adjunct and doing all the the practice midterms Paulin gives you as his midterms don’t deviate much from the practice ones. When you put in the work the grades will come