Excel in math, science, and engineering

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Calculate \(\left(\begin{array}{c}n\\ 0\end{array}\right)^{2}+\left(\begin{array}{c}n\\ 1\end{array}\right)^{2}+\cdots+\left(\begin{array}{c}n\\ n\end{array}\right)^{2}\) when n=18.

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