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-rw-r--r--pygments/lexers/math.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/pygments/lexers/math.py b/pygments/lexers/math.py
index aa3b2ad8..5c065d73 100644
--- a/pygments/lexers/math.py
+++ b/pygments/lexers/math.py
@@ -16,7 +16,7 @@ try:
except NameError:
from sets import Set as set
-from pygments.lexer import Lexer, RegexLexer, bygroups, include
+from pygments.lexer import Lexer, RegexLexer, bygroups, include, do_insertions
from pygments.token import Comment, String, Punctuation, Keyword, Name, \
Operator, Number, Text, Generic