Question 211006
{{{((x^2-x-20)/(x^2*y^3))*((x^3*y^2)/(x^2-10x+25))}}}
={{{(((x-5)(x+4))/(x^2*y^3))*((x^3*y^2)/(x-5)^2)}}}
={{{((x-5)(x+4)(x^3*y^2))/((x-5)^2(x^2*y^3))}}}
={{{((x-5)(x+4)(x*x^2*y^2))/((x-5)(x-5)(x^2*y^2*y))}}}
={{{(cross((x-5))(x+4)(x*cross(x^2*y^2)))/(cross((x-5))(x-5)(cross(x^2*y^2)*y))}}}
={{{(x(x+4))/(y(x-5))}}}