To set up MathJax, one recommendation is to post this code into Blogger design:<script src='http://cdn.mathjax.org/mathjax/latest/MathJax.js' type='text/javascript'>        MathJax.Hub.Config({        HTML: [input/TeX,output/HTML-CSS],        TeX: { extensions: [AMSmath.js,AMSsymbols.js],                equationNumbers: { autoNumber: AMS } },        extensions: [tex2jax.js],        jax: [input/TeX,output/HTML-CSS],        tex2jax: { inlineMath: [ ['$','$'], [\\(,\\)] ],                   displayMath: [ ['$$','$$'], [\\[,\\]] ],                   processEscapes: true },        HTML-CSS: { availableFonts: [TeX],                      linebreaks: { automatic: true } }    });</script>But I failed to find header and design in my Blogger.Can someone show me the process how to paste this code?
MathJax setting in Blogger
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