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\section*{9. Klammersymbole:}

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$\left\backslash   \right. $ \verb|:\left\backslash|\\ 
$\left\lfloor      \right. $ \verb|:\left\lfloor|\\ 
$\left\lceil       \right. $ \verb|:\left\lceil|\\ 
$\left\langle      \right. $ \verb|:\left\langle|\\ 
$\left\uparrow     \right. $ \verb|:\left\uparrow|\\ 
$\left\downarrow   \right. $ \verb|:\left\downarrow|\\ 
$\left\updownarrow \right. $ \verb|:\left\updownarrow|\\ 
$\left\rfloor      \right. $ \verb|:\left\rfloor|\\ 
$\left\rceil       \right. $ \verb|:\left\rceil|\\ 
$\left\rangle      \right. $ \verb|:\left\rangle|\\ 
$\left\Uparrow     \right. $ \verb|:\left\Uparrow|\\ 
$\left\Downarrow   \right. $ \verb|:\left\Downarrow|\\ 
$\left\Updownarrow \right. $ \verb|:\left\Updownarrow|\\ 
$\left.    \,\,\,  \right. $ \verb|:\left.|
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$\left( \int\limits_{a}^{b} (x+1)(x-1)\,dx \right)^{2}$      \\[+2ex]
$\left(x_1,\ldots,x_n\right) $                               \\[+2ex]
\end{document}
