{{ if or (hasPrefix .Inner "\n") (hasPrefix .Inner "<p>") }}
<div class="math">\[
    {{- $inner := replace .Inner "\\<br />\n" "\\\\" -}}
    {{- $inner := replace $inner "<p>" "<p>\\[" -}}
    {{- $inner := replace $inner "</p>" "\\]<p>" -}}
    {{ trim $inner "\n" }}
\]</div>
{{- else -}}<span class="math">\( {{ trim .Inner "\n" }} \)</span>{{- end -}}