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1º:(*9,16)12(5,13)-6,8,15,2(10,14)(1,4,11)3,7
2º:9,16,12(5,13)6-8,15,2,10(1,14)(3,4,11)-7
3º:(*9,16)(12,6)-13,5,15,8(2,10,11)1(3,4)=7-14
4º:(*9,16)-12-6(5,15)-1,11(8,13,10)(2,4)3-7=14
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