"text/latex" output not rendered

[NilsKintscher]

Example using SymPy:

in md:

using SymPy
(x) = SymPy.symbols("x", real=true)
[x 2x]

Output in compiled html:
[\left[ \begin{array}{rr}x&2 x\end{array}\right]]

Image of compiled html:

edit: I should mention that it works in jupyter notebooks. For example: https://nbviewer.jupyter.org/github/JuliaPy/SymPy.jl/blob/master/examples/tutorial.ipynb

[asinghvi17]

It looks like it's missing a backslash at the first and last square brackets...