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Donat el sistema open parentheses table row cell m minus 1 end cell 1 cell negative 1 end cell row 0 cell m minus 2 end cell 1 row m 0 2 end table close parentheses times open parentheses table row x row y row z end table close parentheses equals open parentheses table row 0 row 0 row 0 end table close parentheses, digueu quines afirmacions són certes

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