(-2x²y)³·3xy÷2xy²·4x计算
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算:-2x²y(-2xy²)²+(2xy)³·(xy²)
计算[xy(x²-3y)+3xy²]·(-2xy)+x³y²(2x-y)
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:(-7x²y)(2x²y-3xy³+xy)
计算x²y³-2x(4xy³)
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算
计算:(-3x²y²)²•(2xy)³÷(xy)²
x·(9x³y-3xy²)÷(﹣3x²y) 计算
计算:(xy-x²)×x-y/xy
计算[(x²-y²)/y]²÷(x²+xy)³·(xy/y-x)
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y