Question 398773
xy^-1 - 4x^-1
__________________

(x^2 -xy - 12y^2) x^-2 y^-2


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


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


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


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

...m.ananth@hotmail.ca