59.2 section 2. Solution found using all possible Kovacic cases

59.2.1 problem 1
59.2.2 problem 2
59.2.3 problem 3
59.2.4 problem 4
59.2.5 problem 5
59.2.6 problem 6
59.2.7 problem 7
59.2.8 problem 8
59.2.9 problem 9