Hi Thorham,
I took a look a at github. Cephes seems quiet interesting. Lua I don't know much about - actually I only know it from the plugin system in World of Warcraft
About the level in amath:
It is intended to be an entry level math program targeted at primary school and high school students/pupils. I try to keep the syntax as close to the one used in mathematics.
Amath is not targeted at professionals and never will be. Advanced statistical and mathematical software solutions like SPSS, MatLab and Marple fulfill the needs of those people. And lets face it, most common people don't understand math anyway and will be perfectly happy using a pocket calculator with buttons.
The next releases will focus on portability and I will definitely take a closer look at Cephes.
Thanx.