diff --git a/exercises/footnotes/footnotes.code.done.tex b/exercises/footnotes/footnotes.code.done.tex
index 36a1f65..4e8ad08 100644
--- a/exercises/footnotes/footnotes.code.done.tex
+++ b/exercises/footnotes/footnotes.code.done.tex
@@ -1,6 +1,6 @@
-Java is an object-oriented programming language, that appeared in 
+Java is an object-oriented programming language that appeared in 
 1995. The most recent version of the programming language is 
-version 16\footnote{March 2021}. In order to write Java programs, 
+version 20\footnote{March 2023}. In order to write Java programs, 
 one needs to install the so-called \emph{Java Development Kit 
 (JDK)}.\footnote{\url{https://www.oracle.com/java/technologies/javase-downloads.html}}
 Java programs can be written independently from the operating 
diff --git a/exercises/footnotes/footnotes.raw.tex b/exercises/footnotes/footnotes.raw.tex
index b447e37..c08a136 100644
--- a/exercises/footnotes/footnotes.raw.tex
+++ b/exercises/footnotes/footnotes.raw.tex
@@ -1 +1 @@
-Java is an object-oriented programming language, that appeared in 1995. The most recent version of the programming language is version 16 (March 2021). In order to write Java programs, one needs to install the so-called \emph{Java Development Kit (JDK)}. Java programs can be written independently from the operating system that one uses.
\ No newline at end of file
+Java is an object-oriented programming language that appeared in 1995. The most recent version of the programming language is version 20 (March 2023). In order to write Java programs, one needs to install the so-called \emph{Java Development Kit (JDK)}. Java programs can be written independently from the operating system that one uses.
\ No newline at end of file
diff --git a/exercises/footnotes/task.tex b/exercises/footnotes/task.tex
index aa43e33..8a241dc 100644
--- a/exercises/footnotes/task.tex
+++ b/exercises/footnotes/task.tex
@@ -5,6 +5,4 @@
 Make the text \enquote{March 2021} of the file 
 \file{exercises/footnotes/footnotes.tex} appear as a footnote instead of in 
 parentheses. Additionally, insert a clickable URL to the Java Development Kit 
-as footnote.
-
-\texttt{https://www.oracle.com/java/technologies/javase-downloads.html}
\ No newline at end of file
+as footnote: \\ \texttt{https://www.oracle.com/java/technologies/javase-downloads.html}
diff --git a/exercises/maths/math-formulas.raw.tex b/exercises/maths/math-formulas.raw.tex
index 283efb3..5f71a3e 100644
--- a/exercises/maths/math-formulas.raw.tex
+++ b/exercises/maths/math-formulas.raw.tex
@@ -1,2 +1,4 @@
-% Replace this graphic by the corresponding formulas:
+Replace this graphic by the corresponding formulas:
+
+\vspace{1cm} % some additional spacing before the image
 \includegraphics{graphics/math-formulas.rend-crop.pdf}
diff --git a/exercises/maths/task.tex b/exercises/maths/task.tex
index abbc7a2..09641e0 100644
--- a/exercises/maths/task.tex
+++ b/exercises/maths/task.tex
@@ -1,8 +1,4 @@
 \section{Typesetting mathematics}
 
-Use \LaTeX{} math mode to typeset the following formulas.
-Pay attention to the size of brackets.
-
-\todo{Strange indent}
-
-\vspace{1cm}
\ No newline at end of file
+Use \LaTeX{}'s math mode to typeset the following formulas.
+Pay attention to the size of brackets. Prioritize those formulas that appear to be most useful and/or interesting to you.
\ No newline at end of file
diff --git a/exercises/source-code-listings/source-code-listings.raw.tex b/exercises/source-code-listings/source-code-listings.raw.tex
index e69de29..05c1a52 100644
--- a/exercises/source-code-listings/source-code-listings.raw.tex
+++ b/exercises/source-code-listings/source-code-listings.raw.tex
@@ -0,0 +1 @@
+Your listings go here.
\ No newline at end of file
diff --git a/main-exercises.tex b/main-exercises.tex
index 8f411c7..ab99dfd 100644
--- a/main-exercises.tex
+++ b/main-exercises.tex
@@ -30,50 +30,62 @@
 \setcounter{section}{2}
 
 \input{exercises/basic-document-structure/task}
+\subsubsection*{Modify the content below}
 \input{exercises/basic-document-structure/document-structure.raw}
 
 \newpage
 \input{exercises/project-structure/task}
+\subsubsection*{Modify the content below}
 \input{exercises/project-structure/tasks.raw}
 
 \newpage
 \input{exercises/special-characters/task}
+\subsubsection*{Modify the content below}
 \input{exercises/special-characters/special-characters.raw}
 
 \newpage
 \input{exercises/text-markup/task}
+\subsubsection*{Modify the content below}
 \input{exercises/text-markup/markup.raw}
 
 \newpage
 \input{exercises/lists/task}
+\subsubsection*{Modify the content below}
 \input{exercises/lists/lists.raw}
 
 \newpage
 \input{exercises/maths/task}
+\subsubsection*{Modify the content below}
 \input{exercises/maths/math-formulas.raw}
 
 \newpage
 \input{exercises/graphics/task}
+\subsubsection*{Modify the content below}
 \input{exercises/graphics/graphics.raw}
 
 \newpage
 \input{exercises/tables/task}
+\subsubsection*{Modify the content below}
 \input{exercises/tables/tables.raw}
 
 \newpage
 \input{exercises/footnotes/task}
+\subsubsection*{Modify the content below}
 \input{exercises/footnotes/footnotes.raw}
 
 \newpage
 \input{exercises/references/task}
+\subsubsection*{Modify the content below}
 \input{exercises/references/references.raw}
 
 \newpage
 \input{exercises/literature/task}
+\subsubsection*{Modify the content below}
 \input{exercises/literature/literature.raw}
 
 \newpage
 \input{exercises/source-code-listings/task}
+\subsubsection*{Modify the content below}
 \input{exercises/source-code-listings/source-code-listings.raw}
 
 \end{document}