a) \(=\left|5-\sqrt{24}\right|=5-\sqrt{24}\)
b) \(=3\sqrt{10}+0-24\sqrt{2}=3\sqrt{10}-24\sqrt{2}\)
c) \(=\dfrac{\sqrt{5}+1-\sqrt{5}+1}{5-1}=\dfrac{2}{4}=\dfrac{1}{2}\)
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