diff --git a/pymath/expression.py b/pymath/expression.py
index df1e302..539082d 100644
--- a/pymath/expression.py
+++ b/pymath/expression.py
@@ -413,8 +413,11 @@ if __name__ == '__main__':
 
     exp="-2+a+(12 + 1)(3-12) : 34a"
     #test(exp)
-    e = Expression(exp)
-    print(e.render(render = tex_render))
+
+    #exp="-2+a+(12 + 1)(3-12) : 34a"
+    ##test(exp)
+    #e = Expression(exp)
+    #print(e.render(render = tex_render))
 
     #exp="-2*b+a(12 + 1)(3-12)"
     #test(exp)