\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
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\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{mariabeloruska}
\pdfinfo{
  /Title (-.pdf)
  /Creator (Cheatography)
  /Author (mariabeloruska)
  /Subject (Степенные функции (-) Cheat Sheet)
}

% Lengths and widths
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% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
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\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Степенные функции (-) Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{mariabeloruska} via \textcolor{DarkBackground}{\uline{cheatography.com/121737/cs/22514/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}mariabeloruska \\
  \uline{cheatography.com/mariabeloruska} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 22nd April, 2020.\\
   Updated 23rd April, 2020.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Степенная функция}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{8.4cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/mariabeloruska_1587572875_Screenshot_10.jpg}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{5.68 cm} x{2.32 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Степенная функция}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{y=xr, где r=-2k+1, k∈N} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Область определения & x≠0 \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Множество значений & y≠0 \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
Наименьшее значение & - \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
Наибольшее значение & - \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
Пересечение с осями координат & - \tn 
% Row Count 12 (+ 3)
% Row 6
\SetRowColor{LightBackground}
Нули функции & - \tn 
% Row Count 13 (+ 1)
% Row 7
\SetRowColor{white}
\seqsplit{Отрицательные} значения & (-∞;0) \tn 
% Row Count 15 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\seqsplit{Положительные} значения & (0;+∞) \tn 
% Row Count 17 (+ 2)
% Row 9
\SetRowColor{white}
\seqsplit{Симметричность} & \seqsplit{Нечетная} \tn 
% Row Count 19 (+ 2)
% Row 10
\SetRowColor{LightBackground}
Убывает & (-∞;0) \tn 
% Row Count 20 (+ 1)
% Row 11
\SetRowColor{white}
Возрастает & (0;+∞) \tn 
% Row Count 21 (+ 1)
% Row 12
\SetRowColor{LightBackground}
\seqsplit{Периодичность} & - \tn 
% Row Count 23 (+ 2)
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\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Степенная функция}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{8.4cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/mariabeloruska_1587572894_Screenshot_11.jpg}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4.96 cm} x{3.04 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Степенная функция}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{y=xr, где r=-2k, k∈N} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Область определения & x≠0 \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Множество значений & (0;+∞) \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
Наименьшее значение & - \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
Наибольшее значение & - \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
Пересечение с осями координат & - \tn 
% Row Count 12 (+ 3)
% Row 6
\SetRowColor{LightBackground}
Нули функции & - \tn 
% Row Count 13 (+ 1)
% Row 7
\SetRowColor{white}
\seqsplit{Отрицательные} значения & - \tn 
% Row Count 16 (+ 3)
% Row 8
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\seqsplit{Положительные} значения & \seqsplit{(-∞;0)∪(0;+∞)} \tn 
% Row Count 19 (+ 3)
% Row 9
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\seqsplit{Симметричность} & Четная \tn 
% Row Count 21 (+ 2)
% Row 10
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Возрастает & (-∞;0) \tn 
% Row Count 22 (+ 1)
% Row 11
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Убывает & (0;+∞) \tn 
% Row Count 23 (+ 1)
% Row 12
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\seqsplit{Периодичность} & - \tn 
% Row Count 25 (+ 2)
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\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}