If A=|{:(a,d,l),(b,e,m),(c,f,n):}|" and ...

If `A=|{:(a,d,l),(b,e,m),(c,f,n):}|" and B = "|{:(l,m,n),(a,b,c),(d,e,f):}|`, then

`A+B=0`

`A-B=0`

`AB=0`

`(A)/(B)=0`

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