\(=\dfrac{\sqrt{2}\left(\sqrt{7}+\sqrt{3}\right)}{\sqrt{7}+\sqrt{3}}+\dfrac{7\left(3+\sqrt{2}\right)}{\left(3-\sqrt{2}\right)\left(3+\sqrt{2}\right)}-\dfrac{3.\sqrt{2}^2}{\sqrt{2}}\)
\(=\sqrt{2}+\dfrac{7\left(3+\sqrt{2}\right)}{7}-3\sqrt{2}=-2\sqrt{2}+3+\sqrt{2}=3-\sqrt{2}\)