Posat a prova 2 - 4t - 1 a 4

Posat a prova 2 - 4t - 1 a 4
Posat a prova 2 - 4t - 1 a 4
Posat a prova 2 - 4t - 1 a 4
Posat a prova 2 - 4t - 1 a 4
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Author's Instructions

Operacion, triangles,