计算（-2x﹚²·﹙-1/2xy²﹚³·4y

计算（-2x﹚²·﹙-1/2xy²﹚³·4y
计算（-2x﹚²·﹙-1/2xy²﹚³·4y

计算（-2x﹚²·﹙-1/2xy²﹚³·4y
（-2x﹚²·﹙-1/2xy²﹚³·4y
=4x²×(-1/8x³y的6次方)×4y
=-2x的5次方y的7次方

原式=4x²*1/8x³y^6*4y
=2x^5y^7

原式=4x^2.(-1/(8x^3y^6)).4y=-2/3xy^5