This question already has an answer here:

this piece of latex can be rendered correctly on math.stackexchange.com

$\operatorname{var}[\boldsymbol{\mathrm{AD}}+\mathbf{b}] = \boldsymbol{\mathrm{A}} \operatorname{var}[\boldsymbol{\mathrm{D}}]\boldsymbol{\mathrm{A}}^T$

gives this figure

enter image description here

how to render it correctly on tex.stackexchange.com?

marked as duplicate by David Carlisle, CarLaTeX, Phelype Oleinik, Marcel Krüger, Werner Jul 2 at 17:31

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migrated from tex.stackexchange.com Jul 2 at 10:03

This question came from our site for users of TeX, LaTeX, ConTeXt, and related typesetting systems.

  • 4
    We don't use MathJax: we're interested in TeX, not in approximate representations of its output. – egreg Jul 2 at 9:52

You cannot render tex code directly. tex.stackexchange has not enabled mathjax

If you want to have an image in your post, compile it on your computer and upload a screen shot

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