Question 980303
{{{(x^2+7x+12)/(x^3+4x^2-9x-36)}}}


{{{((x+3)(x+4))/(x^2(x+4)-(9x+36))}}}


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


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


{{{((x+3)(x+4))/((x+3)(x-3)(x+4))}}}


{{{(cross((x+3))cross((x+4)))/(cross((x+3))(x-3)cross((x+4)))}}}


{{{highlight(1/(x-3))}}}