3x-5xy+3y/(-x+3xy-y)
=(3x-5xy)*(-x+3xy-y)/(-x+3xy-y)+3y/(-x+3xy-y)
=[(3x-5xy)*(-x+3xy-y)+3y]/(-x+3xy-y)
=3*x-11*x*y+2*y+15*x*y^2-5*y^2-3/x*y
3x-5xy+3y/(-x+3xy-y)
=(3x-5xy)*(-x+3xy-y)/(-x+3xy-y)+3y/(-x+3xy-y)
=[(3x-5xy)*(-x+3xy-y)+3y]/(-x+3xy-y)
=3*x-11*x*y+2*y+15*x*y^2-5*y^2-3/x*y