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[" If "P=[[1,2,3],[3,1,0],[0,0,1]],Q=[[1...

[" If "P=[[1,2,3],[3,1,0],[0,0,1]],Q=[[1,-2,-3],[-3,1,9],[0,0,-5]]" then "],[(PQ)^(-1)" equals to "]

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