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<response><unit><id>2bed8f86-056c-4137-9762-6a5d517c6efc</id><parent_id>24cbd6a9-a0f3-4eaf-b8ef-e8d96e23a969</parent_id><number>1.2.2.2</number><names>[{"lang":"es","name":"Regla de Sarrus: Cálculo de determinantes de orden 3"},{"lang":"en","name":"Sarrus' rule: Computing third-order determinants"},{"lang":"ca","name":"Regla de Sarrus: Càlcul de determinants d'ordre 3"}]</names><difficulty>6</difficulty><created>18/7/16 11:43</created><modified>18/7/16 11:43</modified></unit></response>
