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Given, A=[{:(1,3,5),(-2,0,2),(0,0,-3):}]...

Given, `A=[{:(1,3,5),(-2,0,2),(0,0,-3):}], B = [{:(0,3),(-2,0),(0,-4):}]`
and `C=[{:(4,1,-2),(3,2,1),(2,-1,7):}],` find (whichever defined)
(i)A+B. (ii)A+C.

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