3/7*5/8-15/56 4/33*11/19-4/3*1/19=4/57 (-15/17)*1/4--15/68 (-3/22)*(-22/3)=3/1*1/3=1/1*1/1=1 4/9*3/5=4/3*1/5=4/15 (-4/31)*(-31/4)=1/31*31/1=1/1*1/1=1 2/11*44/57=2/1*4/57-8/57 1/8*(-13/15) -13/120
3/7*5/8-15/56 4/33*11/19-4/3*1/19=4/57 (-15/17)*1/4--15/68 (-3/22)*(-22/3)=3/1*1/3=1/1*1/1=1 4/9*3/5=4/3*1/5=4/15 (-4/31)*(-31/4)=1/31*31/1=1/1*1/1=1 2/11*44/57=2/1*4/57-8/57 1/8*(-13/15) -13/120