\frac{3y}{x}+\frac{\left(x+1\right)}{y-1}
\(\frac{3y}{x}+\frac{\left(x+1\right)}{y-1} \)
3y (y - 1) + x(x + 1)
_______________ =
x (y - 1)
3y^2 - 3y + x^2 + x
_______________
xy - x
