Created own theme

_includes/utils/mathjax.html

@@ -0,0 +1,27 @@
+<!--MathJAX-->
+<script>
+    MathJax = {
+    tex: {
+        packages: {
+        '[+]': ['mhchem', 'ams']
+        },
+        inlineMath: [              // start/end delimiter pairs for in-line math
+        ['$','$'],
+        ['\\(', '\\)']
+        ],
+        displayMath: [             // start/end delimiter pairs for display math
+        ['$$', '$$'],
+        ['\\[', '\\]']
+        ],
+        tags: 'ams',
+        processRefs: true,
+    },
+    chtml: {
+        scale: 1,
+        minScale: .5,
+        matchFontHeight: true,
+    }
+    };
+</script>
+<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js"></script>