<script type="text/x-mathjax-config">
    MathJax.Hub.Config({
        tex2jax: {
            inlineMath: [ ["$","$"], ["\\(","\\)"] ],
            skipTags: ['script', 'noscript', 'style', 'textarea', 'pre', 'code'],
            processEscapes: true
        }
    });
    MathJax.Hub.Queue(function() {
        var all = MathJax.Hub.getAllJax();
        for (var i = 0; i < all.length; ++i)
            all[i].SourceElement().parentNode.className += ' has-jax';
    });
</script>
<script src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
<script type="text/x-mathjax-config">
    MathJax.Hub.Config({
        tex2jax: {
            inlineMath: [ ["$","$"], ["\\(","\\)"] ],
            skipTags: ['script', 'noscript', 'style', 'textarea', 'pre', 'code'],
            processEscapes: true
        }
    });
    MathJax.Hub.Queue(function() {
        var all = MathJax.Hub.getAllJax();
        for (var i = 0; i < all.length; ++i)
            all[i].SourceElement().parentNode.className += ' has-jax';
    });
</script>
<script src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>

Use https to fixed mixed content serving problem
Use https to fixed mixed content serving problem