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diff --git a/js/mathjax/config/MMLorHTML.js b/js/mathjax/config/MMLorHTML.js
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+// @license magnet:?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7dn=apache-2.0.txt Apache-2.0
+/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+
+/*************************************************************
+ *
+ *  MathJax/config/MMLorHTML.js
+ *  
+ *  Chooses between the NativeMML and HTML-CSS output jax depending
+ *  on the capabilities of the browser and configuration settings
+ *  of the page.
+ *  
+ *  This file should be added to the config array when configuring
+ *  MathJax.  Note that if you include this, you should NOT include
+ *  an output jax in the jax array (it will be added for you by
+ *  this file).
+ *  
+ *  You can specify the preferred output jax on a global or
+ *  browser-by-browser basis.  To specify it globally, use
+ *  
+ *      MathJax.Hub.Config({
+ *        MMLorHTML: {prefer: "MML"} // or "HTML"
+ *      });
+ *  
+ *  To specify on a browser-by-borwser basis, use
+ *  
+ *      MathJax.Hub.Config({
+ *        MMLorHTML: {prefer: {
+ *          MSIE:    "MML",
+ *          Firefox: "MML",
+ *          Opera:   "HTML",
+ *          other:   "HTML"
+ *        }}
+ *      });
+ *
+ *  ---------------------------------------------------------------------
+ *  
+ *  Copyright (c) 2010-2020 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.
+ */
+
+(function (HUB,BROWSER) {
+  var VERSION = "2.7.0";
+  
+  var CONFIG = MathJax.Hub.CombineConfig("MMLorHTML",{
+    prefer: {
+      MSIE:"MML",
+      Firefox:"HTML",
+      Opera:"HTML",
+      Chrome:"HTML",
+      Safari:"HTML",
+      other:"HTML"
+    }
+  });
+
+  var MINBROWSERVERSION = {
+    Firefox: 3.0,
+    Opera: 9.52,
+    MSIE: 6.0,
+    Chrome: 0.3,
+    Safari: 2.0,
+    Konqueror: 4.0
+  };
+  
+  var canUseHTML = (BROWSER.version === "0.0" ||
+                    BROWSER.versionAtLeast(MINBROWSERVERSION[BROWSER]||0.0));
+
+  var canUseMML = (BROWSER.isFirefox && BROWSER.versionAtLeast("1.5")) ||
+                  (BROWSER.isMSIE    && BROWSER.hasMathPlayer) ||
+                  (BROWSER.isSafari  && BROWSER.versionAtLeast("5.0")) ||
+                  (BROWSER.isOpera   && BROWSER.versionAtLeast("9.52"));
+
+  HUB.Register.StartupHook("End Config",function () {
+    var prefer = (CONFIG.prefer && typeof(CONFIG.prefer) === "object" ? 
+                  CONFIG.prefer[MathJax.Hub.Browser]||CONFIG.prefer.other||"HTML" :
+                  CONFIG.prefer);
+
+    if (canUseHTML || canUseMML) {
+      if (canUseMML && (prefer === "MML" || !canUseHTML)) {
+        if (MathJax.OutputJax.NativeMML) {MathJax.OutputJax.NativeMML.Register("jax/mml")}
+          else {HUB.config.jax.unshift("output/NativeMML")}
+        HUB.Startup.signal.Post("NativeMML output selected");
+      } else {
+        if (MathJax.OutputJax["HTML-CSS"]) {MathJax.OutputJax["HTML-CSS"].Register("jax/mml")}
+          else {HUB.config.jax.unshift("output/HTML-CSS")}
+        HUB.Startup.signal.Post("HTML-CSS output selected");
+      }
+    } else {
+      HUB.PreProcess.disabled = true;
+      HUB.prepareScripts.disabled = true;
+      MathJax.Message.Set(
+        ["MathJaxNotSupported","Your browser does not support MathJax"],
+        null,4000
+      );
+      HUB.Startup.signal.Post("MathJax not supported");
+    }
+  });
+
+})(MathJax.Hub,MathJax.Hub.Browser);
+
+MathJax.Ajax.loadComplete("[MathJax]/config/MMLorHTML.js");
+// @license-end