(-3/2xy)(2/3x²-4xy²）+4/3y(3/4x³-1/2x³y)=(-3/2xy)(2/3x²)+(-3/2xy)(-4xy²）+4/3y(3/4x³)+4/3y(-1/2x³y)=-1/x³y+6y+1/x³y-2/3x³y²=6y-2/3x³y&#...