Question 769219
My answer is
{{{(x^12y^8+x^9y^6)/(x^3y^4)}}}
={{{(cross(x^3y^4)(x^9y^4+x^6y^2))/cross(x^3y^4)}}}
={{{x^9y^4+x^6y^2}}}
={{{x^6y^2(x^3y^2+1)}}}