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simplificando 5/3
2) 3/6+1/6+14/6= 18/6
simplificando 3
3) 23/8-14/8= 9/8
4) 45/36+10/36-21/36= 34/36
simplificando 17/18
5) 38/20-8/20+5/20= 35/20
simplificando 7/4
6) 48/40+20/40+15/40-8/40= 75/40
simplificando 15/8
7) 16/6-3/6=13/6
8) 8/12+9/12= 17/12