Question 930210
-3x-3y over 5x^3y^3 divided by 6x+6y over 10xy^2
{{{((3x-3y)/(5x^3y^3))/((6x+6y)/(10xy^2))}}}
{{{(3(x-y)/(5x^3y^3))((10xy^2)/(6(x+y)))}}}
{{{((x-y)/(x^2y))((2)/(2(x+y)))}}}
{{{(x-y)/(x^2y)(x+y)}}}