License expressions of system packages (as in Debian) are too complex

> (lgpl-2.1-plus AND gpl-3.0-plus AND (lgpl-3.0-plus AND gpl-2.0-plus)) AND lgpl-2.1-plus AND gpl-3.0-plus AND gfdl-1.1-plus AND gfdl-1.3-plus AND (lgpl-2.0-plus AND lgpl-3.0 AND gpl-1.0-plus AND gpl-3.0 AND gfdl-1.3) AND lgpl-2.1-plus AND (lgpl-3.0-plus OR gpl-2.0-plus) AND lgpl-2.0-plus AND gpl-3.0 AND (bsd-new OR gpl-1.0-plus) AND bsd-simplified AND public-domain AND isc AND cc0-1.0 AND mit AND mit AND agpl-3.0 AND agpl-3.0 AND agpl-3.0 AND (lgpl-3.0-plus AND gpl-2.0-plus) AND apache-2.0 AND apache-2.0 AND apache-2.0 AND apache-2.0 AND mit AND mit AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus AND gpl-2.0-plus) AND mit AND mit AND lgpl-2.1-plus AND (lgpl-3.0-plus AND gpl-2.0-plus) AND (lgpl-3.0-plus OR gpl-2.0-plus) AND gpl-3.0-plus AND gpl-3.0-plus AND gpl-3.0-plus

could be deduped to:
> '(lgpl-2.1-plus AND gpl-3.0-plus AND (lgpl-3.0-plus AND gpl-2.0-plus)) AND lgpl-2.1-plus AND gpl-3.0-plus AND gfdl-1.1-plus AND gfdl-1.3-plus AND (lgpl-2.0-plus AND lgpl-3.0 AND gpl-1.0-plus AND gpl-3.0 AND gfdl-1.3) AND (lgpl-3.0-plus OR gpl-2.0-plus) AND lgpl-2.0-plus AND gpl-3.0 AND (bsd-new OR gpl-1.0-plus) AND bsd-simplified AND public-domain AND isc AND cc0-1.0 AND mit AND agpl-3.0 AND (lgpl-3.0-plus AND gpl-2.0-plus) AND apache-2.0'

or simplified to:
> 'agpl-3.0 AND apache-2.0 AND bsd-simplified AND cc0-1.0 AND gfdl-1.1-plus AND gfdl-1.3 AND gfdl-1.3-plus AND gpl-1.0-plus AND gpl-2.0-plus AND gpl-3.0 AND gpl-3.0-plus AND isc AND lgpl-2.0-plus AND lgpl-2.1-plus AND lgpl-3.0 AND lgpl-3.0-plus AND mit AND public-domain'

And this without even applying any transform.

We should return a simplified version of every license expression.