（2/1/4）^1/2-（-2014.1）^0-（27/8）^-2/3+（1.5）^-2 =(9/4)^1/2-1-(8/27)^(2/3)+(2/3)^2 =3/2-(2/3)^2+(2/3)^2 =3/2+0 =3/2
