\documentclass[ngerman]{scrreprt}
\usepackage{babel}
\usepackage{xcolor}
\usepackage{pdfpages}% lädt auch graphicx

\usepackage{blindtext}% für Fülltext
\begin{document}
\Blindtext[9]

\begin{table}[h!tbp]
\centering
\setlength\fboxsep{2cm}
\colorbox{orange!20}{\textcolor{purple}{\Huge\bfseries Eine Tabelle}}
\end{table}%

Und noch etwas Text

\includepdf[landscape]{example-image}

\Blindtext
\end{document}

\documentclass{article}
\begin{document}
\setbox0=\hbox{\fontsize{15pt}{0pt}\selectfont fg}
\dimen0=\ht0
\advance \dimen0 by \dp0
\the\dimen0
\end{document}

\dimen0=\ht\strutbox
\advance \dimen0 by \dp\strutbox
\the\dimen0

:21436351 \documentclass{article}
\usepackage{mathtools}
\usepackage{showframe}
\begin{document}
$A(m,n)=\begin{cases}
	n+1 & , \ m=0 \\
	A(m-1, 1) & , \ m>0, n=0\\
	A(m-1, A(m, n-1)) & , \ m>0, n>0
\end{cases}$

\[A(m,n)=\begin{cases}
	n+1 & , \ m=0 \\
	A(m-1, 1) & , \ m>0, n=0\\
	A(m-1, A(m, n-1)) & , \ m>0, n>0
\end{cases}\]
\end{document}

\documentclass{article}
\usepackage{mathtools}
\usepackage{showframe}
\begin{document}
this is a test, containing a penguin, a duck and a platypus, in
sum, this is almost a zoo $\sum_{i=1}^k n_i$.
\[\sum_{i=1}^k n_i\]
\end{document}

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english,greek]{babel}
\usepackage{amsthm}

\begin{document}

\begin{proof}
...
\end{proof}

\end{document}

​
West Indies
First innings 189 all out
Second innings 4 - for 0 wickets (1.0 overs)


England
First innings 257 all out
Second innings 123 all out

West Indies need to score 188 more runs.

\documentclass{article}
\usepackage[american]{babel}
\usepackage[style=apa]{biblatex}
\DeclareLanguageMapping{american}{american-apa}
%\NewBibliographyString{retrieved}
%defined in american-apa.lbx and hence loaded at this point
%shoudln't that be available for definition below?
\DefineBibliographyStrings{american}{
retrieved={some string}
}
\addbibresource{biblatex-examples.bib}
\begin{document}
\fullcite{ctan}
\end{document}