83.32 Chapter VII. Exact differential equations and certain particular forms of equations. Exercise VII (F) at page 113

83.32.1 problem 1
83.32.2 problem 2
83.32.3 problem 3
83.32.4 problem 4
83.32.5 problem 5
83.32.6 problem 6
83.32.7 problem 7
83.32.8 problem 8
83.32.9 problem 9