3 4 5 (x + 1)*(x + 4) *(x + 5) *(x + 6) <= 0
(((x + 1)*(x + 4)^3)*(x + 5)^4)*(x + 6)^5 <= 0
Or(And(-4 <= x, x <= -1), And(x <= -6, -oo < x), x = -5)
(x = -5))∨((-4 <= x)∧(x <= -1))∨((x <= -6)∧(-oo < x)
(-oo, -6] U {-5} U [-4, -1]
x in Union(FiniteSet(-5), Interval(-oo, -6), Interval(-4, -1))