> But when I try to launch it it returns.
quoted text
> "/matlab/bin/glnx86/MATLAB: error while loading shared libraries: libut.so:
> cannot enable executable stack as shared object requires: Permission denied"

I had exactly the same error with Mathematica (caused by the Intel Vector 
Math Library libvml.so).  I needed to apply this patch
 http://marc.info/?l=openbsd-misc&m=119479722118605
to the OpenBSD source-code.