Вычислите

\( \sqrt{\left(5\sqrt3-9\right)^2}+5\sqrt3=\) [ ]
\( \left(\sqrt{11}-\sqrt7\right)\left(\sqrt{11}+\sqrt7\right)=\) [ ]
\( \frac{1}{\sqrt{10}-3}-\frac{1}{\sqrt{10}+3}=\) [ ]