Question 697015
{{{(4x^2y^2-9t^2)/(4x^2y^2-12xyt+9t^2)}}}


{{{((2xy)^2-(3t)^2)/((2xy)^2-12xyt+(3t)^2)}}}


{{{((2xy-3t)(2xy+3t))/((2xy-3t)^2)}}}


{{{(cross((2xy-3t))(2xy+3t))/((2xy-3t)^cross(2))}}}


{{{(2xy+3t)/(2xy-3t)}}}