Not sure if the author's edit changed which calculus he's talking about, but at the time of this posting, they say Calculus 2, which meshes with my experience.

Not sure if the author's edit changed which calculus he's talking about, but at the time of this posting, they say Calculus 2, which meshes with my experience. Lots of schools break up calculus in different ways, and that's fine. My school (and the schools of lots of people I know) break calculus up into calc 1, which is limits, differentials, and a toe dipping into integrals. Calc 2 is the 8 or so different tools for integrating progressively more difficult integrals. Calc 3 is multivariate calculus. Lots of people have a very difficult time with calc 2. It feels very plodding- calc 1 and calc 3 (and diff eq and lin alg...) felt like I was learning new insight every week, calc 2 just felt like memorizing new vocabulary words. It wasn't just that it was hard, it was that it was hard and boring. (obviously if a school breaks calc up differently your experiences will probably be different)