diff --git a/.gitignore b/.gitignore
index 47966e4..8e281ca 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,5 @@ latexdiff.tex
 latexrevise.aux
 latexrevise.tex
 latexdiff-1.0.5a
+dist
+
diff --git a/latexdiff b/latexdiff
index fe7bcd4..895eb28 100755
--- a/latexdiff
+++ b/latexdiff
@@ -556,10 +556,18 @@ push(@SAFECMDLIST, qr/^QLEFTBRACE$/, qr/^QRIGHTBRACE$/);
 ###   my $pat5 = '(?:[^{}]|\\\{|\\\}|\{'.$pat4.'\})*';
 ###   my $pat6 = '(?:[^{}]|\\\{|\\\}|\{'.$pat5.'\})*';
 ### 0.6: Use preprocessing to suppress \{ and \}, so no longer need to account for this in patterns
+###  my $pat0 = '(?:[^{}])*';
+###  my $pat1 = '(?:[^{}]|\{'.$pat0.'\})*';
+###  my $pat2 = '(?:[^{}]|\{'.$pat1.'\})*';
+###  my $pat3 = '(?:[^{}]|\{'.$pat2.'\})*';
+###  my $pat4 = '(?:[^{}]|\{'.$pat3.'\})*';
+###  my $pat5 = '(?:[^{}]|\{'.$pat4.'\})*';
+###  my $pat6 = '(?:[^{}]|\{'.$pat5.'\})*';
+
   my $pat0 = '(?:[^{}])*';
   my $pat_n = $pat0;
-# if you get "undefined control sequence MATHBLOCKmath" error, inclease this loop
-  for (my $i_pat = 0; $i_pat < 100; ++$i_pat){
+# if you get "undefined control sequence MATHBLOCKmath" error, increase the maximum value in this loop
+  for (my $i_pat = 0; $i_pat < 20; ++$i_pat){
     $pat_n = '(?:[^{}]|\{'.$pat_n.'\})*';
   }
 
diff --git a/testsuite/complicated-math-new.tex b/testsuite/complicated-math-new.tex
new file mode 100644
index 0000000..926bae6
--- /dev/null
+++ b/testsuite/complicated-math-new.tex
@@ -0,0 +1,33 @@
+\documentclass{article}
+
+\usepackage{amsmath, amssymb}
+
+\usepackage{bm}
+
+\newcommand{\inprod}[2]{\ensuremath{#1 \cdot #2}}
+\newcommand{\dd}[1]{\ensuremath{d#1\,}}
+\newcommand{\pr}[1]{\left(#1\right)}
+\newcommand{\tr}[1]{\ensuremath{\,{}^{t}\!#1}}
+\DeclareMathOperator{\erf}{erf}
+
+\newcommand{\Kst}{\ensuremath{\bm{K}}}
+\newcommand{\hyper}{\ensuremath{\bm{\rho}}}
+
+\begin{document}
+
+\begin{equation}
+  \label{eq:34}
+    p_{\mathrm{cut}}\pr{\bm{a} \mid \hyper, m_{\mathrm{low}}, m_{\mathrm{high}}, \bm{r}}
+    =0+
+    \frac{
+      2p\pr{\bm{a} \mid \hyper}
+      H\pr{\inprod{\bm{r}}{\bm{a}} - m_{\mathrm{down}}}
+      H\pr{m_{\mathrm{up}} - \inprod{\bm{r}}{\bm{a}}}
+    }{
+      \erf{\pr{m_{\mathrm{high}}/\sqrt{2\tr{\bm{r}}\Kst^{-1}\bm{r}}}}
+      -
+      \erf{\pr{m_{\mathrm{low}}/\sqrt{2\tr{\bm{r}}\Kst^{-1}\bm{r}}}}
+    }
+\end{equation}
+\end{document}
+
diff --git a/testsuite/complicated-math-old.tex b/testsuite/complicated-math-old.tex
new file mode 100644
index 0000000..e82aeff
--- /dev/null
+++ b/testsuite/complicated-math-old.tex
@@ -0,0 +1,33 @@
+\documentclass{article}
+
+\usepackage{amsmath, amssymb}
+
+\usepackage{bm}
+
+\newcommand{\inprod}[2]{\ensuremath{#1 \cdot #2}}
+\newcommand{\dd}[1]{\ensuremath{d#1\,}}
+\newcommand{\pr}[1]{\left(#1\right)}
+\newcommand{\tr}[1]{\ensuremath{\,{}^{t}\!#1}}
+\DeclareMathOperator{\erf}{erf}
+
+\newcommand{\Kst}{\ensuremath{\bm{K}}}
+\newcommand{\hyper}{\ensuremath{\bm{\rho}}}
+
+\begin{document}
+
+\begin{equation}
+  \label{eq:34}
+    p_{\mathrm{cut}}\pr{\bm{a} \mid \hyper, m_{\mathrm{low}}, m_{\mathrm{high}}, \bm{r}}
+    =
+    \frac{
+      2p\pr{\bm{a} \mid \hyper}
+      H\pr{\inprod{\bm{r}}{\bm{a}} - m_{\mathrm{low}}}
+      H\pr{m_{\mathrm{high}} - \inprod{\bm{r}}{\bm{a}}}
+    }{
+      \erf{\pr{m_{\mathrm{high}}/\sqrt{2\tr{\bm{r}}\Kst^{-1}\bm{r}}}}
+      -
+      \erf{\pr{m_{\mathrm{low}}/\sqrt{2\tr{\bm{r}}\Kst^{-1}\bm{r}}}}
+    }
+\end{equation}
+\end{document}
+
diff --git a/testsuite/verify b/testsuite/verify
index 08b0bad..4ac92ee 100755
--- a/testsuite/verify
+++ b/testsuite/verify
@@ -17,7 +17,7 @@ set testroots=( test rapine_et_al island_obs2004 texdiffsample gershwin12 gershw
 delequ latin9 pollack move-equation nomarkup subscript doubledollar \
 DIFDELCMDBUG eqnarray subscriptm delequ2 schneider gennady umesh underwood endfloat outerrise \
 delequ3 delequ4 "simplefrac --allow-spaces" "master --flatten" titlediffTest2 exampleDiff bornd2 \
-"rolla --math-markup=2" mini "complex-maths --math-markup=1" margalit circonflex mwe-comment "apacite-test --flatten" quoteddollarunderscore units \
+"rolla --math-markup=2" mini "complex-maths --math-markup=1" margalit circonflex mwe-comment "apacite-test --flatten" quoteddollarunderscore units complicated-math \
 )
 
 #set testroots= ( test subscript )