8x^2y^4除以(-3x/4y^2)除以(-xy^2/2)

多项式相除,（2x-y)的8次方除以（y-2x)的4次方 解二元一次方程（要过程,除号请用除以来表示）y除以2+x除以3=13,y除以3-x除以4=3.3x+2y=48,7x+6y=128. 8x^2y^4除以(-3x/4y^2)除以(-xy^2/2) 解方程组3(x+y)-4(x-y)=4,x+y除以2+x-y除以6=1 [(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x= {(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y [(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)请帮我一下写两道计算题[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)[（3x+2y）（3x-2y）-（x+2y）（5x-2y）]除以（4x） [(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4X等于好多 (x/x+y +2y/x+y)乘以xy/ x+2y除以(1/x+1/y)（2）（3x^2/4y)^2乘以2y/3x+ x^2/2y^2除以2y^2/x 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 已知x-y=1,求[(x+2y)^2+(2x+y)(x-4y)-3(x+y)(x-y)]除以y的值大神们帮帮忙 【(4x-3y)(4x+3y)-(2x-3y)(5x+3y)]除以6x [(5x+2y)(3x+2y)+(x+2y)(x-2y)]除以4x 已知2x-y除以x+y等于2,求代数式(4x-2y除以x+y)-(4x+4y除以2x-y)的值 28+x-3y=8x-4(y+5)除以3 5（x-y)+2(1+x)=3y除以2 解方程组 [(2x+y)^2-(x+y)(x-4y)-5y^2]除以2x 已知X除3-Y除4=3X+2Y-75=3,求x,y的值? （-2X^2/Y)^2*(-2Y^2/3X)^2除以(2Y/X)^4