9. {−3, 3}
11. {−3, 3}
13. {−5,−1}
15. {−1, 7}
17. {−76, 116}
19. {−2,−1}
21. {−6, 6}
23. {−20, 4}
25. {−1, 2}
27. ∅
29. ∅
31. {−2, 2}
33. {−1, 2}
35. {−13, 1}
37. {−4}
39. {−3,−59}
41. {0, 2}
43. {54, 32}
45. ∅
47. (−4, 4)
49. (−∞,−4)∪(4, ∞)
51. (−4, 2)
53. (−∞, ∞)
55. (−12, 72)
57. (−∞, 1)∪(4, ∞)
59. [−233, 5]
61. ∅
63. (−12, ∞)
65. (−∞,−6]∪[0, ∞)
67. [−5,−2)∪(−2,−1]
69. (12, 1)∪(1, 52)
71. (−∞, 115]∪[3, ∞)
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