Loading [MathJax]/extensions/TeX/mhchem.js

attempt at CodeMirror + in-place MathJax [source on github]

Rendering math...

**To edit formulas, move cursor into them with arrow keys.**  Clicking with mouse should work but currently doesn't :-(.

# Inline math $a<b>c$
> xXxXxXxXxXxXxXxXxXxXxXxX
Normal-size line with $n = 2$ compact formulas: $x*y$.  There was a `*` in that formula but this text should not be italic.
xXxXxXxXxXxXxXxXxXxXxXxX
>> Foo \(\sum^{y}_{z} \frac{1}{x}\) bar.
xXxXxXxXxXxXxXxXxXxXxXxX

## Misc MathJax extensions
AMScd: $ \begin{CD} A @<<< B @>>> C\\ @. @| @AAA\\ @. D @= E \end{CD}$
cancel: $ \cancelto{\cot}{\tan} \frac{A \bcancel{B}}{\bcancel{B} C} $
mhchem: \( \ce{$A$ ->[\ce{+H2O}] $B$} \)
*et cetera...*  (No thanks to this library, I simply enabled them in [MathJax config](http://docs.mathjax.org/en/latest/tex.html).)

# Display math
The following `...xXx formula xXx...` are written on one line but the formula is displayed separately.
> xXxXxXxXxXxXxXxXxXxXxXxX $$\sum^b_c \frac{1}{a}$$ xXxXxXxXxXxXxXxXxXxXxXxX

## Maxwell's Equations
\begin{aligned}   \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\   \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\   \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\   \nabla \cdot \vec{\mathbf{B}} & = 0 \end{aligned}

# Numbering — quite broken
This demo has `autoNumber: "AMS"` in [MathJax config](http://docs.mathjax.org/en/latest/options/TeX.html),
so `\begin{equation}` works at first glance — but it's pretty broken:

$$\sum^b_c \frac{1}{a}$$
> BUG: numbering is unusable, increments with every edit.

This is a forward reference [\ref{ref2}] and another \eqref{ref2} for the following equation:
\begin{equation}x+1\over\sqrt{1-x^2}\label{ref2}\end{equation}
This is a back reference [\ref{ref2}] and another \eqref{ref2} for the preceding equation.
(can also put `[eq]ref` inside math:  $\ref{ref2} \Rightarrow \eqref{ref2}$.)
> BUG: labels are completely broken, result in error second time equation is typeset!

\begin{align} x& = y_1-y_2+y_3-y_5+y_8-\dots && \text{by \eqref{ref1}}\\ & = y'\circ y^* && \text{(by \eqref{ref3})}\\ & = y(0) y' && \text {by Axiom 1.} \end{align}

# Defining macros
Define \foo: \newcommand{\foo}{f_0^0}
Use \foo: $\foo$
> BUG: definition changes don't trigger re-typesetting, but it's rare enough that refreshing the page is acceptable workaround.

# In monospace
    xXxXxXxXxXxXxXxXxXxXxXxX
    >> Foo \(\sum^y_z \frac{1}{x}\) bar.
    xXxXxXxXxXxXxXxXxXxXxXxX
    $$\sum^b_c \frac{1}{a}$$
    xXxXxXxXxXxXxXxXxXxXxXxX

--------------------------------------------------------------------------------

 
**To edit formulas, move cursor into them with arrow keys.**  Clicking with mouse should work but currently doesn't :-(.
​
# Inline math $a<b>c$
> xXxXxXxXxXxXxXxXxXxXxXxX
Normal-size line with $n = 2$ compact formulas: $x*y$.  There was a `*` in that formula but this text should not be italic.
xXxXxXxXxXxXxXxXxXxXxXxX
>> Foo \(\sum^{y}_{z} \frac{1}{x}\) bar.
xXxXxXxXxXxXxXxXxXxXxXxX
​
## Misc MathJax extensions
AMScd: $ \begin{CD} A @<<< B @>>> C\\ @. @| @AAA\\ @. D @= E \end{CD}$
cancel: $ \cancelto{\cot}{\tan} \frac{A \bcancel{B}}{\bcancel{B} C} $
mhchem: \( \ce{$A$ ->[\ce{+H2O}] $B$} \)
*et cetera...*  (No thanks to this library, I simply enabled them in [MathJax config](http://docs.mathjax.org/en/latest/tex.html).)
​
# Display math
The following `...xXx formula xXx...` are written on one line but the formula is displayed separately.
> xXxXxXxXxXxXxXxXxXxXxXxX $$\sum^b_c \frac{1}{a}$$ xXxXxXxXxXxXxXxXxXxXxXxX
​
## Maxwell's Equations
\begin{aligned}   \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\   \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\   \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\   \nabla \cdot \vec{\mathbf{B}} & = 0 \end{aligned}
\newcommand{\foo}{f_0^0} \newcommand{\foo}{f_0^0} \newcommand{\foo}{f_0^0} \newcommand{\foo}{f_0^0} \newcommand{\foo}{f_0^0} \newcommand{\foo}{f_0^0} \newcommand{\foo}{f_0^0} \newcommand{\foo}{f_0^0} \newcommand{\foo}{f_0^0} \newcommand{\foo}{f_0^0} 