So, If I want implement my own formulas, I must use only a c compiler, trasform formulas with it and then put it as dll's on m3d, right?
Nonono...
It's not absolutely easy as that.
Please it's plenty of softwares with editable formulas, use them and when
(and if) you come with an extremely interesting variation not present in MB3D yet - ask
Remember to do some test renders to show us effects of your transform, too.