One additional note concerning the use of non standard delimiters with the Moodle 2.7 MathJaxloader filter is needed. In addition to adding something like TeX:{inline: ['%i','%i'],display:['display:['%d','%d']} to the MathJax configuration the settings, one also has to add ;%i, %d to the 'Additional delimiters' box near the bottom of the page. Entering only one or the other does not help any.
Mathematics tools
begin{matrix*} and mathtools package
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