a: \(=\left(12\sqrt{2}-8\sqrt{2}+25\sqrt{2}\right)\cdot2\sqrt{2}\)
\(=24\cdot2-8\cdot2\cdot2+50\cdot2=116\)
b: \(=\dfrac{8}{5}\sqrt{10}+\dfrac{7}{2}\sqrt{10}-\sqrt{11}+\sqrt{11}+1\)
\(=\dfrac{51}{10}\sqrt{10}+1\)
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