Developer Kit Trial

Hi All,
I downloaded trial Checkbox Server to evaluate some features i need.
I would know if developer kit can be also evaluated.
If not, i would ask a couple of questions about it:
1. I need to elaborate answers scores applying some math complex expressions, and I couldn't find this feature in Checkbox Server. So i would know if would be possible to do this by exdending surveys behaviours or implement a custom item to accomplish to this work.
2.I will need surveys answers and scoring to integrate into a parent analisys system, which collects data from many sources, including CheckBox in the future. Is that possibile?

Thank you all