\(
\newcommand{\nPr}[2]{{}^{#1}A_{#2} }
\newcommand{\combin}[2]{{}^{#1}C_{#2} }
\newcommand{\cmod}[3]{#1 \equiv #2\left(\bmod {}{#3}\right)}
\newcommand{\frc}[2]{\displaystyle\frac{#1}{#2}}
\newcommand{\mdc}[2]{\left( {#1},{#2}\right)}
\newcommand{\mmc}[2]{\left[ {#1},{#2}\right]}
\newcommand{\cis}{\mathop{\rm cis}}
\newcommand{\ImP}{\mathop{\rm Im}}
\newcommand{\ReP}{\mathop{\rm Re}}
\newcommand{\sen}{\mathop{\rm sen}}
\newcommand{\tg}{\mathop{\rm tg}}
\newcommand{\cotg}{\mathop{\rm cotg}}
\newcommand{\cosec}{\mathop{\rm cosec}}
\newcommand{\cotgh}{\mathop{\rm cotgh}}
\newcommand{\cosech}{\mathop{\rm cosech}}
\newcommand{\sech}{\mathop{\rm sech}}
\newcommand{\sh}{\mathop{\rm sh}}
\newcommand{\ch}{\mathop{\rm ch}}
\newcommand{\th}{\mathop{\rm th}}
\newcommand{\senEL}[1]{\mathop{\rm sen}^{#1}}
\newcommand{\tgEL}[1]{\mathop{\rm tg}^{#1}}
\newcommand{\cotgEL}[1]{\mathop{\rm cotg}^{#1}}
\newcommand{\cosecEL}{\mathop{\rm cosec}^{#1}}
\newcommand{\shEL}[1]{\mathop{\rm sh^{#1}}}
\newcommand{\chEL}[1]{\mathop{\rm ch^{#1}}}
\newcommand{\thEL}[1]{\mathop{\rm th^{#1}}}
\newcommand{\cotghEL}[1]{\mathop{\rm cotgh^{#1}}}
\newcommand{\cosechEL}[1]{\mathop{\rm cosech^{#1}}}
\newcommand{\sechEL}[1]{\mathop{\rm sech^{#1}}}
\newcommand{\senq}{\senEL{2}}
\newcommand{\tgq}{\tgEL{2}}
\newcommand{\cotgq}{\cotgEL{2}}
\newcommand{\cosecq}{\cosecEL{2}}
\newcommand{\cotghq}{\cotghEL{2}}
\newcommand{\cosechq}{\cosechEL{2}}
\newcommand{\sechq}{\sechEL{2}}
\newcommand{\shq}{\shEL{2}}
\newcommand{\chq}{\chEL{2}}
\newcommand{\arctg}{\mathop{\rm arctg}}
\newcommand{\arcsen}{\mathop{\rm arcsen}}
\newcommand{\argsh}{\mathop{\rm argsh}}
\newcommand{\argch}{\mathop{\rm argch}}
\newcommand{\Var}{\mathop{\rm Var}}
\newcommand{\vect}[1]{\overrightarrow{#1}}
\newcommand{\tr}[1]{ \textnormal{Tr}\left({#1}\right)}
\newcommand{\C}{\mathbb{C}}
\newcommand{\E}{\mathbb{E}}
\newcommand{\H}{\mathbb{H}}
\newcommand{\I}{\mathbb{I}}
\newcommand{\N}{\mathbb{N}}
\newcommand{\P}{\mathbb{P}}
\newcommand{\Q}{\mathbb{Q}}
\newcommand{\R}{\mathbb{R}}
\newcommand{\Z}{\mathbb{Z}}
\newcommand{\til}{\sim}
\newcommand{\mdc}{\mathop{\rm m.d.c.}}
\newcommand{\mmc}{\mathop{\rm m.m.c.}}
\newcommand{\vect}[1]{\overrightarrow{#1}}
\newcommand{\dfrc}{\displaystyle\frac}
\newcommand{\Mod}[1]{\ (\mathrm{mod}\ #1)}
\)
