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Thanks! Im trying to acquire every leg up. I started a video lecture series on calculus, but I've been so busy that I haven't devoted as much time to it as I'd like. But I'm really happy with the timing of my precalculus as well. I also am reading Calculus Better Explained and it's interesting! I'm happy to learn the math in a way that I understand it, and not have a "fragile knowledge" as R. Feynman puts it.