A∪B=B∪A,A∩B=B∩A, A∪(B∪C)=(A∪B)∪C, A∩(B∩C)=(A∩B)∩C A∪(B∩C)=(A∪B)∩(A∪C), A∩(B∪C)=(A∩B)∪(A∩C) (A∩B)C=AC∪BC, (A∪B)C=AC∩BC
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