化简:(1)(x²/-y)的5次方·(y²/-x)³; (2)(-y/x)²÷(
因式分解x的5次方y-x³y+2x²y-xy
因式分解:x的5次方-2x³y²+x*y的4次方
1/x²×x³+x的7次方÷x² 2/、【(x-y)²+(x+y)(x-y)]÷
计算:2(x²y³)³-(x³y²)²·y的5次方-(x
计算:(1)(-x²/y)·(-y²/x)³÷(-y/x)的4次方;
计算:(x-y)的5次方(x-y)²(x-y)³
多项式x的4次方-2y的5次方+x³y-1/4xy³-x²y的4次方-xy+6是_____
观察下列一串单项式的特点:-xy,2x²y,-4x³y,8x的4次方y,-16x的5次方y
8(x+y)的八次方(x-y)的七次方÷[2(x+y)³(x-y)³]²
化简:(-3x³y)²+(2x²)³*(-y)²+4x的6次方*y
先化简,再求值:(3x²y-2)×y-(9x的4次方y³-15x²y²)÷(3x
x²y的-3次方(x的-1次方y)³(2ab²c的-3次方)的-2次方÷(a的-2次方b)