3xy^2(-1/3x^2y+4x^3y^2)+4x^2y(-3/2xy^2)2xy的值
=-x³y³+12x^4y^4-12x^4y^4
=-x^3y^3
=-(-3×1/3)³
=1;
手机提问的朋友在客户端右上角评价点【满意】即可.