I see this professor all the time when I walk through MS. He's always available. Math 33B is the easiest of the 30 series, although the 31s were easy. Class continues what was introduced in 31B. He stresses the theory of differential equations, which can be tricky but shouldn't be too bad if you really understand it. Only bad thing is there's no cheat sheet and the quizzes can be annoying and stressful.

Bleh. I thought this class was alright. Ralston is a pretty cool professor and explains things well if you can actually keep your focus on him, which can be hard cause he can kinda drone on. He's old and kinda silly but I don't mind. Second midterm crushed my soul but he curves a lot. Overall his tests can be pretty conceptual but his quizzes are more straightforward. I had X Yang as a TA and he basically explained the similar problems to those that were on the quiz before we took the quiz, which made them pretty easy. His accent was pretty ridiculous though.

im surprised to see people complain about his teaching style since i took him back in w'07. He was good and fair. One thing to note is that all the proof based stuff that's on the tests is explicitly covered in lecture, so don't be lazy and make sure you know the lecture material well and not just the book problems (random proofs from the book that he didn't cover in lecture never showed up on my tests, but this could have changed since i took him). Definitely the easiest math class of the 30 series (32B being the hardest) and probably the easiest class i've taken in college so far. Here's a gist of the class: recognize the form of an equation, identify what method you use to solve an equation of this form, then solve it (and also know the conceptual stuff he mentions in lecture). it's very simple and straightforward.