Alternatives to (not full of security holes)?

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I own website, and am right now working on a feature where
my users can submit their own algebra solvers.

These solvers can either be written in a simple markup language (not
interesting), or in perl.

I first chose to run user submitted code in a safe
compartment.  Now I realize that is so full of holes that it
is not funny. It does not seem to be maintained anymore.

Is there some other alternative to that would let me run perl
code in a compartment?



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