\(=\sqrt{5-2\sqrt{5}.\sqrt{2}+2}-\dfrac{14\left(3+\sqrt{10}\right)}{\left(3-\sqrt{10}\right)\left(3+\sqrt{10}\right)}\)
\(=\sqrt{\left(\sqrt{5}-\sqrt{2}\right)^2}-\dfrac{14\left(3+\sqrt{10}\right)}{9-10}\)
\(=\left|\sqrt{5}-\sqrt{2}\right|+14\left(3+\sqrt{10}\right)\)
\(=\sqrt{5}-\sqrt{2}+42+14\sqrt{10}\)
\(\sqrt{7-2\sqrt{10}}-\dfrac{14}{3-\sqrt{10}}\\ =\sqrt{\left(\sqrt{5}-\sqrt{2}\right)^2}-\dfrac{14}{3-\sqrt{10}}\\ =\dfrac{\left(\sqrt{5}-\sqrt{2}\right)\left(3-\sqrt{10}\right)-14}{3-\sqrt{10}}\\ =\dfrac{3\sqrt{5}-3\sqrt{2}-5\sqrt{2}+2\sqrt{5}-14}{3-\sqrt{10}}\\ =\dfrac{5\sqrt{5}-8\sqrt{2}-14}{3-\sqrt{10}}\)
