Calculus is a must. There's also some little formulas that you learn/learn to derive. You basically start from scratch and make the formulas every time, it's quite fun.
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The Integration in Volumes will never be too difficult, it's all about setting up the integral. I guess you could do Volumes just why you've really got all the techniques fresh. Conics has no Integration and, for me at least, was a bit of a chore haha.