计算(-3/2xy)(2/3x²-4xy²)+4/3y(3/4x³-1/2x³y
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:(-7x²y)(2x²y-3xy³+xy)
3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)
计算(-3/2xy)(2/3x²-4xy²)+4/3y(3/4x³-1/2x³y
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
计算(2x³-3x²y-2xy²)-(x³-2xy²+y³)
计算:(3x³y)²*(4y)²÷(2xy)³
(2x²y-3xy²)-3(x²y-2xy²)+2(x²y-4xy
(-2/3X³y+4x²y²-1/2xy²)/(-xy/4) 急
计算:x²y-(2xy²-5x²y)+3xy²-y³
计算4xy+(x-2y)的平方+(x+3y)(3y-x)