Input:
<math><mtext><table><mglyph><style><![CDATA[</style><img title="]]&gt;&lt;/mglyph&gt;&lt;img&Tab;src=1&Tab;onerror=alert(1)&gt;">

Output:

Mutate level:
1 2 3 4 5 6 + auto add padding? + HTMLSanitizer + auto update use template