Question

Add:

2/y^2 - 3x/y-x - 3/y

Answer 1

If your spacing means

2/y^2 - 3x/(y-x) - 3/y

then the common denominator is (y-x)y^2 and you wind up with

(-3xy^2 + 3xy - 2x - 3y^2 + 2y) / (y-x)y^2