Спростити вираз
1.(A ∪ U ∩ (B̄ ∩ B)) ∪ AĀ
2.(A ∪ B ∩ C) ∩ (A ∪ B̄ )
3.((A ∪ B)\(AA ∪ B̄ )) ∪ B
4.(A\B)\(B \C)\A
5.(A ∪ B̄ ∪ B̄ ∩ C ∩ A ∪ B̄ ∪ C̄ ) ∩ (A ∩ (B\A))