1 1 1 1 ----- - ----- >= ----- - ----- x - 1 x - 2 x + 1 x + 2
1/(x - 1) - 1/(x - 2) >= -1/(x + 2) + 1/(x + 1)
Or(And(-2 < x, x < -1), And(1 < x, x < 2))
((-2 < x)∧(x < -1))∨((1 < x)∧(x < 2))
(-2, -1) U (1, 2)
x in Union(Interval.open(-2, -1), Interval.open(1, 2))