This is a method which calculates ln(x) and exp(x) then evaluates power

has resonable to good accuracy

sun microsystems math library helped a lot --> remez algorithm --> Number decay methods --> bitwise operations --> quake III FISR methods --> still dont know what (1+(int))&x means please help

https://www.netlib.org/fdlibm/e_log.c

https://www.netlib.org/fdlibm/e_exp.c

https://www.netlib.org/fdlibm/readme