diff --git a/Advanced/Cryptography/parts/1 mod.tex b/Advanced/Cryptography/parts/1 mod.tex
index 5fa7786..5213b3d 100755
--- a/Advanced/Cryptography/parts/1 mod.tex	
+++ b/Advanced/Cryptography/parts/1 mod.tex	
@@ -8,7 +8,7 @@ Create a multiplication table for $\mathbb{Z}_4$:
 
 \begin{center}
 \begin{tabular}{c | c c c c}
-	\times & 0 & 1 & 2 & 3 \\
+	$\times$ & 0 & 1 & 2 & 3 \\
 	\hline
 	0 & ? & ? & ? & ? \\
 	1 & ? & ? & ? & ? \\
diff --git a/Advanced/Intro to Proofs/main.tex b/Advanced/Intro to Proofs/main.tex
index 126d59b..8b3cf1e 100755
--- a/Advanced/Intro to Proofs/main.tex	
+++ b/Advanced/Intro to Proofs/main.tex	
@@ -220,10 +220,10 @@
 		Show that for any two functions $g: Y \to W$ and $h: Y \to W$, if
 		$g \circ f = h \circ f \implies g = h$.
 
-		\item[\star] Let $f: X \to Y$ be a function where for any set $Z$ and functions $g: Z \to X$ and $h: Z \to X$,
+		\item[$\star$] Let $f: X \to Y$ be a function where for any set $Z$ and functions $g: Z \to X$ and $h: Z \to X$,
 		$f \circ g = f \circ h \implies g = h$. Show that $f$ is injective.
 
-		\item[\star] Let $f: X \to Y$ be a function where for any set $W$ and functions $g: Y \to W$ and $h: Y \to W$,
+		\item[$\star$] Let $f: X \to Y$ be a function where for any set $W$ and functions $g: Y \to W$ and $h: Y \to W$,
 		$g \circ f = h \circ f \implies g = h$. Show f is surjective.
 	\end{itemize}