diff --git a/likelihood/exercises/Makefile b/likelihood/exercises/Makefile
index 27691d9..cbfb17a 100644
--- a/likelihood/exercises/Makefile
+++ b/likelihood/exercises/Makefile
@@ -1,34 +1,3 @@
-TEXFILES=$(wildcard exercises??.tex)
-EXERCISES=$(TEXFILES:.tex=.pdf)
-SOLUTIONS=$(EXERCISES:exercises%=solutions%)
+TEXFILES=$(wildcard likelihood-?.tex)
 
-.PHONY: pdf exercises solutions watch watchexercises watchsolutions clean
-
-pdf : $(SOLUTIONS) $(EXERCISES)
-
-exercises : $(EXERCISES)
-
-solutions : $(SOLUTIONS)
-
-$(SOLUTIONS) : solutions%.pdf : exercises%.tex instructions.tex
-	{ echo "\\documentclass[answers,12pt,a4paper,pdftex]{exam}"; sed -e '1d' $<; } > $(patsubst %.pdf,%.tex,$@)
-	pdflatex -interaction=scrollmode $(patsubst %.pdf,%.tex,$@) | tee /dev/stderr | fgrep -q "Rerun to get cross-references right" && pdflatex -interaction=scrollmode $(patsubst %.pdf,%.tex,$@) || true
-	rm $(patsubst %.pdf,%,$@).[!p]*
-
-$(EXERCISES) : %.pdf : %.tex instructions.tex
-	pdflatex -interaction=scrollmode $< | tee /dev/stderr | fgrep -q "Rerun to get cross-references right" && pdflatex -interaction=scrollmode $< || true
-
-watch :
-	while true; do ! make -q pdf && make pdf; sleep 0.5; done
-
-watchexercises :
-	while true; do ! make -q exercises && make exercises; sleep 0.5; done
-
-watchsolutions :
-	while true; do ! make -q solutions && make solutions; sleep 0.5; done
-
-clean :
-	rm -f *~ *.aux *.log *.out
-
-cleanup : clean
-	rm -f $(SOLUTIONS) $(EXERCISES)
+include ../../exercises.mk
diff --git a/likelihood/exercises/instructions.tex b/likelihood/exercises/instructions.tex
deleted file mode 100644
index 7fe599d..0000000
--- a/likelihood/exercises/instructions.tex
+++ /dev/null
@@ -1,41 +0,0 @@
-\vspace*{-8ex}
-\begin{center}
-\textbf{\Large Introduction to scientific computing}\\[1ex]
-{\large Jan Grewe, Jan Benda}\\[-3ex]
-Neuroethology lab \hfill --- \hfill Institute for Neurobiology \hfill --- \hfill \includegraphics[width=0.28\textwidth]{UT_WBMW_Black_RGB} \\
-\end{center}
-
-% \ifprintanswers%
-% \else
-
-% % Die folgenden Aufgaben dienen der Wiederholung, \"Ubung und
-% % Selbstkontrolle und sollten eigenst\"andig bearbeitet und gel\"ost
-% % werden. Die L\"osung soll in Form eines einzelnen Skriptes (m-files)
-% % im ILIAS hochgeladen werden. Jede Aufgabe sollte in einer eigenen
-% % ``Zelle'' gel\"ost sein. Die Zellen \textbf{m\"ussen} unabh\"angig
-% % voneinander ausf\"uhrbar sein. Das Skript sollte nach dem Muster:
-% % ``variablen\_datentypen\_\{nachname\}.m'' benannt werden
-% % (z.B. variablen\_datentypen\_mueller.m).
-
-% \begin{itemize}
-% \item \"Uberzeuge dich von jeder einzelnen Zeile deines Codes, dass
-%   sie auch wirklich das macht, was sie machen soll! Teste dies mit
-%   kleinen Beispielen direkt in der Kommandozeile.
-% \item Versuche die L\"osungen der Aufgaben m\"oglichst in
-%   sinnvolle kleine Funktionen herunterzubrechen.
-%   Sobald etwas \"ahnliches mehr als einmal berechnet werden soll,
-%   lohnt es sich eine Funktion daraus zu schreiben!
-% \item Teste rechenintensive \code{for} Schleifen, Vektoren, Matrizen
-%   zuerst mit einer kleinen Anzahl von Wiederholungen oder kleiner
-%   Gr\"o{\ss}e, und benutze erst am Ende, wenn alles \"uberpr\"uft
-%   ist, eine gro{\ss}e Anzahl von Wiederholungen oder Elementen, um eine gute
-%   Statistik zu bekommen.
-% \item Benutze die Hilfsfunktion von \code{matlab} (\code{help
-%     commando} oder \code{doc commando}) und das Internet, um
-%   herauszufinden, wie bestimmte \code{matlab} Funktionen zu verwenden
-%   sind und was f\"ur M\"oglichkeiten sie bieten.
-%   Auch zu inhaltlichen Konzepten bietet das Internet oft viele
-%   Antworten!
-% \end{itemize}
-
-% \fi
diff --git a/likelihood/exercises/exercises01.tex b/likelihood/exercises/likelihood-1.tex
similarity index 70%
rename from likelihood/exercises/exercises01.tex
rename to likelihood/exercises/likelihood-1.tex
index 4512e91..28b3946 100644
--- a/likelihood/exercises/exercises01.tex
+++ b/likelihood/exercises/likelihood-1.tex
@@ -1,90 +1,17 @@
 \documentclass[12pt,a4paper,pdftex]{exam}
 
-\usepackage[german]{babel}
-\usepackage{pslatex}
-\usepackage[mediumspace,mediumqspace,Gray]{SIunits}      % \ohm, \micro
-\usepackage{xcolor}
-\usepackage{graphicx}
-\usepackage[breaklinks=true,bookmarks=true,bookmarksopen=true,pdfpagemode=UseNone,pdfstartview=FitH,colorlinks=true,citecolor=blue]{hyperref}
-
-%%%%% layout %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\usepackage[left=20mm,right=20mm,top=25mm,bottom=25mm]{geometry}
-\pagestyle{headandfoot}
-\ifprintanswers
-\newcommand{\stitle}{: Solutions}
-\else
-\newcommand{\stitle}{}
-\fi
-\header{{\bfseries\large Exercise 11\stitle}}{{\bfseries\large Maximum likelihood}}{{\bfseries\large January 7th, 2020}}
-\firstpagefooter{Prof. Dr. Jan Benda}{Phone: 29 74573}{Email:
-jan.benda@uni-tuebingen.de}
-\runningfooter{}{\thepage}{}
-
-\setlength{\baselineskip}{15pt}
-\setlength{\parindent}{0.0cm}
-\setlength{\parskip}{0.3cm}
-\renewcommand{\baselinestretch}{1.15}
-
-%%%%% listings %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\usepackage{listings}
-\lstset{
-  language=Matlab,
-  basicstyle=\ttfamily\footnotesize,
-  numbers=left,
-  numberstyle=\tiny,
-  title=\lstname,
-  showstringspaces=false,
-  commentstyle=\itshape\color{darkgray},
-  breaklines=true,
-  breakautoindent=true,
-  columns=flexible,
-  frame=single,
-  xleftmargin=1em,
-  xrightmargin=1em,
-  aboveskip=10pt
-}
-
-%%%%% math stuff: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\usepackage{amsmath}
-\usepackage{amssymb}
-\usepackage{bm} 
-\usepackage{dsfont}
-\newcommand{\naZ}{\mathds{N}}
-\newcommand{\gaZ}{\mathds{Z}}
-\newcommand{\raZ}{\mathds{Q}}
-\newcommand{\reZ}{\mathds{R}}
-\newcommand{\reZp}{\mathds{R^+}}
-\newcommand{\reZpN}{\mathds{R^+_0}}
-\newcommand{\koZ}{\mathds{C}}
-
-%%%%% page breaks %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\newcommand{\continue}{\ifprintanswers%
-\else
-\vfill\hspace*{\fill}$\rightarrow$\newpage%
-\fi}
-\newcommand{\continuepage}{\ifprintanswers%
-\newpage
-\else
-\vfill\hspace*{\fill}$\rightarrow$\newpage%
-\fi}
-\newcommand{\newsolutionpage}{\ifprintanswers%
-\newpage%
-\else
-\fi}
-
-%%%%% new commands %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\newcommand{\qt}[1]{\textbf{#1}\\}
-\newcommand{\pref}[1]{(\ref{#1})}
-\newcommand{\extra}{--- Zusatzaufgabe ---\ \mbox{}}
-\newcommand{\code}[1]{\texttt{#1}}
+\newcommand{\exercisetopic}{Maximum Likelihood}
+\newcommand{\exercisenum}{10}
+\newcommand{\exercisedate}{January 12th, 2021}
 
+\input{../../exercisesheader}
+
+\firstpagefooter{Prof. Dr. Jan Benda}{}{jan.benda@uni-tuebingen.de}
 
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \begin{document}
 
-\input{instructions}
-
+\input{../../exercisestitle}
 
 \begin{questions}
 
diff --git a/regression/exercises/gradientdescent-1.tex b/regression/exercises/gradientdescent-1.tex
index 8275723..7e25b0d 100644
--- a/regression/exercises/gradientdescent-1.tex
+++ b/regression/exercises/gradientdescent-1.tex
@@ -2,7 +2,7 @@
 
 \newcommand{\exercisetopic}{Resampling}
 \newcommand{\exercisenum}{9}
-\newcommand{\exercisedate}{December 21th, 2020}
+\newcommand{\exercisedate}{December 22th, 2020}
 
 \input{../../exercisesheader}
 
diff --git a/regression/exercises/instructions.tex b/regression/exercises/instructions.tex
deleted file mode 100644
index 3041d3e..0000000
--- a/regression/exercises/instructions.tex
+++ /dev/null
@@ -1,6 +0,0 @@
-\vspace*{-7.8ex}
-\begin{center}
-\textbf{\Large Introduction to Scientific Computing}\\[2.3ex]
-{\large Jan Grewe, Jan Benda}\\[-3ex]
-Neuroethology Lab \hfill --- \hfill Institute for Neurobiology \hfill --- \hfill \includegraphics[width=0.28\textwidth]{UT_WBMW_Black_RGB} \\
-\end{center}