While writing Math nodes for my nodeedit project, I found one significant bug in the FxGraph/3D code. The script incorrectly processes a square brackets and "rnd" command in some cases.
Updated scripts:
http://moi.maxsm.net/media/files/FxGraph3D.v.1.1.2016.04.17.zip
http://moi.maxsm.net/media/files/FxGraph.v.1.2e.2016.04.17.zip