a) \(=\sqrt{36}-\sqrt{9}+3\sqrt{81}-\dfrac{5}{2}=6-3+27-\dfrac{5}{2}=\dfrac{55}{2}\)
b) \(=\dfrac{\sqrt{3}\left(3+\sqrt{3}\right)}{\sqrt{3}}+\dfrac{\left(1+\sqrt{2}\right)^2}{1-2}-3\sqrt{3}+2\sqrt{2}=3+\sqrt{3}-1-2-2\sqrt{2}-3\sqrt{3}+2\sqrt{2}=-2\sqrt{3}\)
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