a777a4d7-7a1a-4a25-ae99-b0bbacb4133c836b0b88-39dc-4359-884f-37f4f4a0ecf17.1.2[{"lang":"es","name":"Igualdad entre conjuntos. Subconjuntos y superconjuntos"},{"lang":"en","name":"Equality between sets. Subsets and Supersets"},{"lang":"ca","name":"Igualtat entre conjunts. Subconjunts i superconjunts"}]47/18/16, 11:43 AM7/18/16, 11:43 AM