Subtema: CombinatoriaParte: BProject ID: 9000140506Accepted: 1Clonable: 0Easy: 0Simplifica \(\frac{2!} {1!} + \frac{3!} {2!} + \frac{4!} {3!}\).\(9\)\(\frac{29} {6} \)\(\frac{9} {6}\)\(\frac{12!+9!+8!} {6!} \)