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Step-by-step explanation:
A=1,2,3,4,5
B=4,6,8,9,10,12
(AUB)=1,2,3,4,5,6,8,9,10,12
(AnB)=4
(A-B)=1,2,3,5
(B-A)=6,8,9,10,12
(AUB)-(AnB)=1,2,3,5,6,8,9,10,12
(A-B)U(B-A)=1,2,3,5,6,8,9,10,12
Hence proved that (AUB)-(AnB) =(A-B)U(B-A)