Sequences And Series

Let \(a_{1}, a_{2}, \ldots, a_{n}\) be in A.P. If \(a_{5}=2 a_{7}\) and \(a_{11}=18\), then


\(12\left(\frac{1}{\sqrt{a_{10}}+\sqrt{a_{11}}}+\frac{1}{\sqrt{a_{11}}+\sqrt{a_{12}}}+\ldots+\frac{1}{\sqrt{a_{17}}+\sqrt{a_{18}}}\right)\) is equal to ____________.