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\begin{document}

\begin{equation}
\label{eq:delimiters}
\left\}\sum_{i = 0}^{10} i^2 \right\{\qquad 
\left[\sum_{i = 0}^{10} i^2 \right\updownarrow\qquad 
\left\vert\sum_{i = 0}^{10} i^2 \right.\qquad 
\left.\sum_{i = 0}^{10} i^2 \right\Vert
\end{equation}

\end{document}