(-2/3)+0-|5+1/6|+|-(4+5/6)|+(9+1/3)=-2/3-5-1/6+4+5/6+9+1/3=(9+4-5)+(-2/3-1/6+5/6+1/3)=8+(-2/3+4/6+1/3)=8+(-2/3+2/3+1/3)=8+1/3=8又1/3
