36.3 Chapter 2, First order differential equations. Section 2.4, Exact equations. Exercises. page 64

36.3.1 problem 1
36.3.2 problem 2
36.3.3 problem 3
36.3.4 problem 4
36.3.5 problem 5
36.3.6 problem 6
36.3.7 problem 7
36.3.8 problem 8
36.3.9 problem 9
36.3.10 problem 10
36.3.11 problem 12
36.3.12 problem 13
36.3.13 problem 14
36.3.14 problem 15
36.3.15 problem 16
36.3.16 problem 17
36.3.17 problem 18