({{1,0,0},{-1,1,0},{0,0,1}}.{{1,0,0},{0,1,0},{2,0,1}}.{{1,0,0},{0,1,0},{0,-4,1}}).({{1,0,0},{0,1,0},{0,0,9}}.{{1,0,0},{0,1,3},{0,0,1}}.{{1,4,0},{0,1,0},{0,0,1}})

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