diff --git a/quick demo_files/MathJax.js b/quick demo_files/MathJax.js
new file mode 100644
index 0000000..8245519
--- /dev/null
+++ b/quick demo_files/MathJax.js
@@ -0,0 +1,19 @@
+/*
+ *  /MathJax.js
+ *
+ *  Copyright (c) 2009-2016 The MathJax Consortium
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
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