Question 1129166
{{{(12/(y^2 + y) -12/(xy+x) )/(1/(xy+x) - 1/(y^2 +y) )}}}


{{{(12/y(y+ 1) -12/x(y+1) )/(1/x(y+1) - 1/y(y +1) )}}}


{{{((12x -12y)/xy(y+1) )/((y - x)/xy(y +1) )}}}


{{{(12(x -y)/cross(xy(y+1) ))/((y - x)/cross(xy(y +1))) }}}



{{{(12(x -y))/(y - x )}}}


{{{(-12(y -x))/(y - x )}}}


{{{(-12cross((y -x)))/cross((y - x ))}}}


{{{-12}}}