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1/5+1/7=(7+5)/35=12/35
ahora a 5/6 le restamos nuestro resultado obtenido
5/6-12/35=(175-72)/210=103/210
5/6 - (1/5 + 2/7) =
5/6 - ( 7/35 + 10/35) =
5/6 - (17/35)
(35*5)/ (35*6) - (17 * 6)/(35*6) =
175/210 - 102/210 =
73/210
Respue
73/210