计算x²y³-2x(4xy³)
计算x²y³-2x(4xy³)
计算:(-7x²y)(2x²y-3xy³+xy)
分解因式计算6x³y(x-y)³-4xy³(y-x)²
计算:-2x²y(-2xy²)²+(2xy)³·(xy²)
计算:(xy-x²)×x-y/xy
计算(2x³-3x²y-2xy²)-(x³-2xy²+y³)
计算:x²y-(2xy²-5x²y)+3xy²-y³
计算:(3x³y)²*(4y)²÷(2xy)³
计算 (_2x²y³)²×(4xy²)-¹×(2x²y)
计算[xy(x²-3y)+3xy²]·(-2xy)+x³y²(2x-y)
计算(-3/2xy)(2/3x²-4xy²)+4/3y(3/4x³-1/2x³y
(x^2+xy/x-y)/(xy/x-y)计算