Question 629044
(x-1)(x-2)(x-3)<0
number line
<...-....1....+....2...-.....3....+....>
solution: (-&#8734;,1) U (2,3)
.. 
(x+3)(1-x)/(x+4)(x-5)>0
number line
<....+..-4....-...-3...+....1...-....5..+...>
Solution: (-&#8734;,-4) U (-3, 1) U (5,&#8734;)