网页引入mathjax，latex

<script type="text/x-mathjax-config">
MathJax.Hub.Config({
    showProcessingMessages: false,
    messageStyle: "none",
    extensions: ["tex2jax.js"],
    jax: ["input/TeX", "output/HTML-CSS"],
    tex2jax: {
        inlineMath:  [ ["$", "$"] ],
        displayMath: [ ["$$","$$"] ],
        skipTags: ['script', 'noscript', 'style', 'textarea', 'pre','code','a'],
        ignoreClass:"comment-content"
    },
    "HTML-CSS": {
        availableFonts: ["STIX","TeX"],
        showMathMenu: false
    }
});
MathJax.Hub.Queue(["Typeset",MathJax.Hub]);
</script>
<script src="//cdn.bootcss.com/mathjax/2.7.0/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>

<script type="text/x-mathjax-config">
var mathId = document.getElementById("post-content");
MathJax.Hub.Config({
    showProcessingMessages: false,
    messageStyle: "none",
    extensions: ["tex2jax.js"],
    jax: ["input/TeX", "output/HTML-CSS"],
    tex2jax: {
        inlineMath:  [ ["$", "$"] ],
        displayMath: [ ["$$","$$"] ],
        skipTags: ['script', 'noscript', 'style', 'textarea', 'pre','code','a'],
        ignoreClass:"comment-content"
    },
    "HTML-CSS": {
        availableFonts: ["STIX","TeX"],
        showMathMenu: false
    }
});
MathJax.Hub.Queue(["Typeset",MathJax.Hub,mathId]);
</script>
<script src="//www.bsck.org cdn.bootcss.com/mathjax/2.7.0/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>

<script data-no-instant>
InstantClick.on('change', function(isInitialLoad){
    if (isInitialLoad === false) {
        if (typeof MathJax !== 'undefined'){
            MathJax.Hub.Queue(["Typeset",MathJax.Hub]);
        }
    }
});
InstantClick.init();
</script>

<script data-no-instant>
InstantClick.on('change', function(isInitialLoad){
    if (isInitialLoad === false) {
        if (typeof MathJax !== 'undefined'){
            var mathId = document.getElementById("post-content");
            MathJax.Hub.Queue(["Typeset",MathJax.Hub,mathId]);
        }
    }
});
InstantClick.init();
</script>