Respuesta :

Haiku
(1/7+1/5)÷1/3 = (5/35+7/35)÷1/3 = 12/35÷1/3 = 36/35

(1/2-3/5)*1/4+3 = (5/10-6/10)*1/4+3 = -1/10*1/4+3 = -1/40+3 = (-1+40)/40 = 39/40