Задание
Упрости выражение
\(\left(\dfrac{\sqrt{b}}{b-9}-\dfrac{\sqrt{b}}{b-6\sqrt{b}+9}\right)\cdot \dfrac{(3-\sqrt{b})^2}{2\sqrt{b}}+\dfrac{3}{\sqrt{b}+3}=\) [ ];
\(\left(\dfrac{\sqrt{a}}{b}+\dfrac{2}{\sqrt{b}}+ \dfrac{1}{\sqrt{a}}\right)\cdot \dfrac{\sqrt{ab}}{b-a}+\dfrac{2}{\sqrt{a}-\sqrt{b}}=\) [ ];
\(\left(\dfrac{\sqrt{m}}{n-\sqrt{mn}}-\dfrac{2}{\sqrt{n}-\sqrt{m}}+ \dfrac{\sqrt{n}}{m-\sqrt{mn}}\right):\dfrac{m-n}{4\sqrt{mn}}=\) [ ].