I'm not even talking very advanced stuff. I wouldn't say my math is particularly good. I've forgotten most of the specifics of what was taught in those classes. I totally use Wolfram Alpha when I can, I don't do math for the thrill of doing it, but because I have a problem and I'm trying to find a solution. I think it's more important to have the ability to break down a problem mathematically, and then read up on the parts you need than to remember everything by rote. The problem is that if you've never taken any advanced math, it's very difficult to read up on it and knowing where to start.