\(=4\cdot5+\dfrac{\sqrt{194}}{7}=20+\dfrac{\sqrt{194}}{7}=\dfrac{140+\sqrt{194}}{7}\)
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\(=4\cdot5+\dfrac{\sqrt{194}}{7}=20+\dfrac{\sqrt{194}}{7}=\dfrac{140+\sqrt{194}}{7}\)