Creates the object that implements IMathParser interface.
If you wish to extend the parser implementation by deriving
from the implementation, current implementation class name is
However, for any unforeseen reason that name or
constructor can change. If you change the original implementation, please
rename the package, so that when deployed, there is no conflict with other
user's classpaths that contain the original implementation.
Bestcode will try to make sure future versions will not break older ones.