A∩B∩C = multime vida
(A∩B) ∪C ={2,4} ∪{1,3,6,7,8} = {1,2,3,4,6,7,8}
(A/B) ∩C = {1,3} ∩{1,3,6,7,8} = {1,3}
B/{A∩C) = {2,4,6,8} / {1,3} = {2,4,6,8}
