Выбери верные ответы

Упрости выражения.

1. \(\dfrac{a}{b} + \dfrac{a}{a+b} =\) [ \(\frac{a^2+2}{b^2}\) | \(\frac{a}{b^2+b}\) | \(\frac{a^2+2ab}{b^2+ab}\) ].
2. \(\dfrac{x}{x-2} - \dfrac{4}{x+2} =\) [ \(\frac{x^2-2x+8}{x^2-4}\) | \(\frac{x^2-2x-8}{(x-2)(x+2)}\) | \(\frac{-2x+8}{4}\) ].
3. \(\dfrac{a}{b+1} + \dfrac{a}{3b-2} =\) [ \(\frac{2ab-3a}{(b+1)(3b-2)}\) | \(\frac{4ab-a}{3b-1}\) | \(\frac{4ab-a}{(b+1)(3b-2)}\) ].