-6（1/2x³-1/3y³+1/6)+24(1/3x³-1/2y³+1/4)

若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值 计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^ {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)( 已知方程组2x+y=6 x-3y=1,求7y（x-3y）²-2（3y-x）³的值 不解方程组{2x＋Y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值. 已知方程组{2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值. 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 约分下列分式(x-y)/(y-x)³(x²-9)/(6-2x)(x²-1)/(x-x
x四次方+x³-3x²-4x-4 x(x-1)+y(y+1)-2xy (x-2)³-(y- 多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x&# y=(1+x)(2-3x²)(3-4x³)求导数y´