-10x^3y除以-5x^2+25x^2y^2除以-5x^2=

-10x^3y除以-5x^2+25x^2y^2除以-5x^2= 分式的加减:[(x/y-y/x)除以（x+y）+x（1/y-1/x)]除以1+x/y,其中x=5,y=2 (5x^4-10x^3y+25x^2y^2)除以(-5x^2)=_____________________ (2x+3y)除以(5x-3y)=3/5求x比y 【(x-y)^2+(x+y)(x-y)】除以 2x 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 [(x+2y)的平方-(x+y)(x-y)-5y的平方]除以(2x) 函数y=2x+3除以(x-1)(x 为什么3x除以4等于2y除以5就相当于x除以y等于8除以15? [(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以4x [(5x+2y)(3x+2y)+(x+2y)(x-2y)]除以4x 已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值