Fix the formulas bug, make it inline possible

layouts/partials/head.html

@@ -53,4 +53,7 @@
 {{ else -}}
     {{ $res := resources.Get "css/lib/animate/animate.min.css" | resources.Minify -}}
     <link rel="stylesheet" href="{{ $res.RelPermalink }}">
+{{ end }}
+{{ if or .Params.math .Site.Params.math }}
+    {{ partial "math.html" . }}
 {{ end }}

layouts/partials/math.html

@@ -0,0 +1,10 @@
+<script>
+    document.addEventListener("DOMContentLoaded", function() {
+        renderMathInElement(document.body, {
+            delimiters: [
+              {left: "$$", right: "$$", display: true},
+              {left: "$", right: "$", display: false}
+            ]
+        });
+    });
+</script>