76.40 Chapter VIII. Exact differential equations, and equations of particular forms. Integration in series. problems at page 94

76.40.1 problem Ex. 1
76.40.2 problem Ex. 2
76.40.3 problem Ex. 3
76.40.4 problem Ex. 4
76.40.5 problem Ex. 5
76.40.6 problem Ex. 6
76.40.7 problem Ex. 7