Question 642260
{{{(-64x^7+48x^5+36x^3+24x)/8x^4}}}

{{{4x(-16x^6+12x^4+9x^2+6)/8x^4}}}

{{{cross(4)cross(x)(-16x^6+12x^4+9x^2+6)/cross(8)2x^cross(4)^3}}}

{{{(-16x^6+12x^4+9x^2+6)/2x^3}}}