\(
\newcommand{\combin}[2]{{}^{#1}C_{#2} }
\newcommand{\cmod}[3]{#1 \equiv #2\left(\bmod {}{#3}\right)}
\newcommand{\mdc}[2]{\left( {#1},{#2}\right)}
\newcommand{\mmc}[2]{\left[ {#1},{#2}\right]}
\newcommand{\cis}{\mathop{\rm cis}}
\newcommand{\sen}{\mathop{\rm sen}}
\newcommand{\senq}{\mathop{\rm sen^2}}
\newcommand{\tg}{\mathop{\rm tg}}
\newcommand{\tgq}{\mathop{\rm tg^2}}
\newcommand{\arctg}{\mathop{\rm arctg}}
\newcommand{\arcsen}{\mathop{\rm arcsen}}
\newcommand{\vect}[1]{\overrightarrow{#1}}
\newcommand{\tr}[1]{ \textnormal{Tr}\left({#1}\right)}
\newcommand{\N}{\mathbb{N}}
\newcommand{\Z}{\mathbb{Z}}
\newcommand{\Q}{\mathbb{Q}}
\newcommand{\R}{\mathbb{R}}
\newcommand{\C}{\mathbb{C}}
\newcommand{\H}{\mathbb{H}}
\newcommand{\vect}[1]{\overrightarrow{#1}}
\newcommand{\Mod}[1]{\ (\mathrm{mod}\ #1)}
\)
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