<?xml version="1.0" encoding="UTF-8"?>
<response><unit><id>8055b90f-9d40-4cd5-84d9-ef4aa69d13b8</id><parent_id>78b509ea-53a4-4055-ba96-f3763304dccf</parent_id><number>8.1.7</number><names>[{"lang":"es","name":"Ecuaciones con números factoriales y números combinatorios"},{"lang":"en","name":"Equations with factorial numbers and combinatorial numbers"},{"lang":"ca","name":"Equacions amb nombres factorials i nombres combinatoris"}]</names><difficulty>7</difficulty><created>7/18/16, 11:43 AM</created><modified>7/18/16, 11:43 AM</modified></unit></response>
