extern  long double CbrtAM1(long double x,long double c);
extern  long double CbrtA01(long double x,long double c);
extern  long double CbrtAP1(long double x,long double c);
extern  long double CbrtBM1(long double x,long double c);
extern  long double CbrtB01(long double x,long double c);
extern  long double CbrtBP1(long double x,long double c);
extern  long double CbrtAM2(long double x,long double c);
extern  long double CbrtA02(long double x,long double c);
extern  long double CbrtAP2(long double x,long double c);
extern  long double CbrtBM2(long double x,long double c);
extern  long double CbrtB02(long double x,long double c);
extern  long double CbrtBP2(long double x,long double c);
extern  long double CbrtAM3(long double x,long double c);
extern  long double CbrtA03(long double x,long double c);
extern  long double CbrtAP3(long double x,long double c);
extern  long double CbrtBM3(long double x,long double c);
extern  long double CbrtB03(long double x,long double c);
extern  long double CbrtBP3(long double x,long double c);
extern  long double CbrtAM4(long double x,long double c);
extern  long double CbrtA04(long double x,long double c);
extern  long double CbrtAP4(long double x,long double c);
extern  long double CbrtBM4(long double x,long double c);
extern  long double CbrtB04(long double x,long double c);
extern  long double CbrtBP4(long double x,long double c);
extern  long double CbrtAM5(long double x,long double c);
extern  long double CbrtA05(long double x,long double c);
extern  long double CbrtAP5(long double x,long double c);
extern  long double CbrtBM5(long double x,long double c);
extern  long double CbrtB05(long double x,long double c);
extern  long double CbrtBP5(long double x,long double c);
extern  long double CbrtAM6(long double x,long double c);
extern  long double CbrtA06(long double x,long double c);
extern  long double CbrtAP6(long double x,long double c);
extern  long double CbrtBM6(long double x,long double c);
extern  long double CbrtB06(long double x,long double c);
extern  long double CbrtBP6(long double x,long double c);