[{{a,b,c},{d,e,f},{0,0,1}} . {{g,h,i},{j,k,l},{0,0,1}}] . {{x},{y},{1}} = {{a,b,c},{d,e,f},{0,0,1}} . [{{g,h,i},{j,k,l},{0,0,1}}. {{x},{y},{1}}]

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