8/7*38+43*8/7-8/7 =(8/7)*(38+43-1)=(8/7)*80=708/9*14/5*10/7 =(8/9)*(14/7)*(10/5)=(8/9)*(2/1)*(2/1)=32/96/39*13/5-6/1 =(6/5)*(39/13)-6/1=(6/5)*(3/1)-18/3=18/5-18/3=18/2=9/14/9*（3/1-4/1）=(4/9)*(3/1)-(...