1/3+2/3=（5/6-1/4）*5/6=3/7*7/6-1/2=4/9+1/3=16/15-2/3=3/4*4/5=1/2-3/7=3+9/10+3/2=3/4-15/8=1/2+1/4+1/8+1/16=3/8*2/9+1=(1/3+5/6)*1/7=121/100-12/10=1/3+3/4=16/7-3/14=99/26*13/11=1/2+3/2+4/3=1+3/8*2/3=19/...