`f(x) gt 0 AA x in (-5, -2) UU (-1, 3) uu (7, oo)``f(x) lt 0 AA x in (-oo, -5) uu (-2, -1) uu (3, 7)``f(x)gt 0 AA x in (-5, -2) uu (-1,3) uu(9, oo)``f(x)lt 0 AA x in (-oo, -5) uu (-2, -1)uu (-2, -1) uu (3, 4)`
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