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True
False
(-∞,9)
(-∞,∞)
[-∞,∞]
[-7,∞)
(-∞,2)
[2,∞)
(-∞,-3)U(2,∞)
(-∞,-3)U(2,6]
(-3,2)U[6,∞)
[-3,2)U(0,∞)