=3/2*5/7+5/7*5/2-1/2*5/7-1-[1-(1-1/2*1/3)*6]=15/14+25/14-5/14+3=11/2
3/2*5/7+25/14-(1/2) /(7/5)-【1-6+1】=15/14+25/14-5/14-4=-3/2
3/2*5/7+5/7*5/2-1/2*5/7=5/2-1-(1-6+1/6*6)=3
原式=3/2*5/7+5/2*5/7-1/2*5/7-1-0 =5/7*7/2-1 =1.5