snippet beg "begin{} / end{}"
\begin{$1}
	$0
\end{$1}
endsnippet

snippet bm "multline"
\begin{multline*}
	$0
	\\\
\end{multline*}
endsnippet

snippet // "Fraction" iA
\\frac{$1}{$2} $0
endsnippet

snippet gauss "matrix" i
\begin{array} ({$1})
	$0
\end{array}
endsnippet

snippet matr "matrix" i
\begin{array} $1
	$0
\end{array}
endsnippet

snippet pmat "pmatrix" i
\begin{pmatrix}
	$0
\end{pmatrix}
endsnippet

snippet head "file head"
\documentclass{article}

\usepackage[russian]{babel}
\usepackage[utf8x]{inputenc}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{systeme}
\usepackage{delarray}
\usepackage{tikz}
\usepackage{pgfplots}

\title{$1}
\author{–Ф–µ–љ–Є—Б –Ъ–Њ–Ј–ї–Њ–≤}

\begin{document}
\maketitle
\newpage

$0
\end{document}
endsnippet

snippet lr "left right" i
\left$1 $3 \right$2 $0
endsnippet

snippet lr( "left( right)" i
\left( $1 \right) $0
endsnippet

snippet sec "section" b
\section*{$1}
$0
endsnippet

snippet ssec "subsection" b
\subsection*{$1}
$0
endsnippet