jawab yg bener yy... lagi butuh nih

[tex]\displaystyle \frac{\frac{1}{x+y}-\frac{2}{x-y}}{\frac{3}{x-y}+\frac{4}{x+y}} \\ \\ \frac{\frac{1(x-y)-2(x+y)}{(x+y)(x-y)}}{\frac{3(x+y)+4(x-y)}{(x-y)(x+y)}}=\frac{\frac{x-y-2x-2y}{x^2-y^2}}{\frac{3x+3y+4x-4y}{x^2-y^2}} \\ \\ \frac{x-y-2x-2y}{3x+3y+4x-4y}=\frac{-x-3y}{7x-y}[/tex]