2.2 Chapter 1. First order equations: Some integrable cases. Excercises XIII at page 24

2.2.1 Problem (a)
2.2.2 Problem (c)
2.2.3 Problem (d)
2.2.4 Problem (e)
2.2.5 Problem (f)
2.2.6 Problem (g)
2.2.7 Problem (h)
2.2.8 Problem (i)