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A=[{:(5,-1),(6,7):}],B=[{:(2,1),(3,4):}]...

`A=[{:(5,-1),(6,7):}],B=[{:(2,1),(3,4):}]andC=[{:(1,3),(-1,4):}]` then verify that
(i) (A)=A
(ii) (A+B)=A+B
(iii) (3A)'=3A
(iv) (AB)'=B'A'

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