diff --git a/pymath/expression.py b/pymath/expression.py
index 8b08f42..e997ff6 100644
--- a/pymath/expression.py
+++ b/pymath/expression.py
@@ -411,10 +411,10 @@ if __name__ == '__main__':
     #e = Expression(exp)
     #print(e)
 
-    exp="-2+a+(12 + 1)(3-12) + 34a"
-    test(exp)
+    exp="-2+a+(12 + 1)(3-12) : 34a"
+    #test(exp)
     e = Expression(exp)
-    print(e)
+    print(e.render(render = tex_render))
 
     #exp="-2*b+a(12 + 1)(3-12)"
     #test(exp)