计算(-2x﹚²·﹙-1/2xy²﹚³·4y
计算:-2x²y(-2xy²)²+(2xy)³·(xy²)
计算[x/﹙xy+y﹚]·[﹙x²+x﹚/x²y]
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算x²y³-2x(4xy³)
计算[xy(x²-3y)+3xy²]·(-2xy)+x³y²(2x-y)
用公式计算(2y-3x)(4y²+6xy+9x²﹚
计算[(x²-y²)/y]²÷(x²+xy)³·(xy/y-x)
计算 ﹙x的平方-4y的平方﹚/3xy的三次方·xy/﹙x+2y﹚
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:(-7x²y)(2x²y-3xy³+xy)
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
计算:(-x)²x³·(-2y)³-(-2xy)²·(-3x)³y.