Question 314945
{{{(r^2-5r+6)/(r^2-4)=((r-2)(r-3))/((r-2)(r+2))}}}
{{{(r^2-5r+6)/(r^2-4)=(cross(r-2)(r-3))/(cross(r-2)(r+2))}}}
{{{(r^2-5r+6)/(r^2-4)=(r-3)/(r+2)}}}