I started doing integrals on my own when I was 14 (grade 9), but my classmates didn't learn about integrals until grade 13. This was in Italy however, and I'm n

I started doing integrals on my own when I was 14 (grade 9), but my classmates didn't learn about integrals until grade 13. This was in Italy however, and I'm not sure about when they're introduced to students in the States. I can tell you though, that a first year undergraduate student at a scientific faculty shouldn't be overly worried about approaching a book like this.