（-3）^3÷2又1/4*（-2/3）^2+8+（-2）^2*（-2/3）——除以
=-27÷9/4x4/9+8-4x2/3
=8-27x4/9x4/9-8/3
=8-(16/3+8/3)
=8-8
=0
