Mathjax:

1. prevent clip due to x scroll
2. (IE support)add polyfill.js advised from mathjax

assets/sass/components/_math.scss

@@ -1,4 +1,5 @@
 .MathJax {
     overflow-x: auto;
     overflow-y: hidden;
+    box-sizing: border-box;
 }

layouts/partials/script/single-script.html

@@ -46,6 +46,7 @@
     }
   };
   </script>
+  <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
   <script async src="{{ $js.mathjax.url }}"></script>
 {{ end }}