We studied the book in order starting from chapter 1 in the first calc class up to the last chapters in calc 4. I was in the last class when he gave me the idea

We studied the book in order starting from chapter 1 in the first calc class up to the last chapters in calc 4. I was in the last class when he gave me the idea to cut it, so I cut out the last few chapters and carried a very thin volume of what I needed for the last class.