sederhana yper2+x-3per3y

[tex] \frac{y}{2 + x} - \frac{3}{3y} = \\ \frac{y}{2 + x} - \frac{1}{y} = \\ \frac{y {}^{2} - (2x + x) }{y \times (2 + x)} = \\ \frac{y {}^{2} - 2 - x }{2y + xy} [/tex]