2c:
\(\dfrac{1}{\sqrt{5}-2}+\dfrac{3\sqrt{2}-2\sqrt{3}}{\sqrt{3}-\sqrt{2}}-\dfrac{1}{2+\sqrt{5}}\)
\(=\dfrac{2+\sqrt{5}-\sqrt{5}+2}{\left(\sqrt{5}-2\right)\left(\sqrt{5}+2\right)}+\dfrac{\sqrt{6}\left(\sqrt{3}-\sqrt{2}\right)}{\sqrt{3}-\sqrt{2}}\)
\(=\dfrac{4}{5-4}+\sqrt{6}=4+\sqrt{6}\)