Hi,
AFAIK OS3.9 mathlibs, are based on HSMath ones.
OxyPatcher has nothing to do with the mathlibs. OP replaces some missing instructions, in the 040-060 cpu.
my personal experience for example, is that the "Free Srub" in ProStationAudio, is useable thanks to OP (with my 040@30Mhz cpu).
Even LightWave rendering time, benefits by the presence of OP as well.
Ciao