A. A⋃B={1,2,3,4,5}
A⋃C={1,2,3,5,7}
A ⋃D={1,2,3,5,6,8}
B ⋃C={2,3,4,5,7}
B ⋃A={2,3,4,1,5}
D ⋃C={6,8,3,5,7}
(A ⋃B) ⋃C={1,2,3,4,5,7}
(A ⋃B)(A ⋃C)={1,2,3,4,5,7}
B ⋃C ⋃D={2,3,4,56,7,8}
B. A ∩B={2,3}
A ∩C={3,5}
B ∩C={3}
(A ⋃ D) ∩C={3,5}
(A ∩D) ⋃ B= Ø ⋃{2,3,4}
(A ∩B) ⋃ (B ∩C)={2,3}
(A ∩B) ⋃ (9&A ∩C)={2,3,5}
C.A\B={1,5}
B\A={4}
A\C={1,2}
C\A={7}
C\B={5,7}
A\D={1,2,3,5}
(A\B) ⋃ (C\B)={5}
