/* ---------------------------------- */
/* save as fb.h                       */
/* ---------------------------------- */
double f(
double x,
double y)
{
 return(  x );
}
/* ---------------------------------- */
char  feq[] = "x";
/* ---------------------------------- */
/* ---------------------------------- */
double u(
double y)
{
 return(      (y*y) );
}
/* ---------------------------------- */
char  ueq[] = "y**2";
/* ---------------------------------- */
/* ---------------------------------- */
double v(
double y)
{
 return(      (4) );
}
/* ---------------------------------- */
char  veq[] = "4";
/* ---------------------------------- */
/* ---------------------------------- */
double g(
double x,
double y)
{
 return       (x*x*  x );
}
/* ---------------------------------- */
char  geq[] = "x**2  x";
/* ---------------------------------- */
/* ---------------------------------- */
double h(
double x,
double y)
{
 return       (y*y*  x );
}
/* ---------------------------------- */
char  heq[] = "y**2  x";
/* ---------------------------------- */
/* ---------------------------------- */
double gplsh(
double x,
double y)
{
 return(   (x*x + y*y)*   (x) );
}
/* ---------------------------------- */
char  gplsheq[] = "(x**2 + y**2)  (x)";
/* ---------------------------------- */
/* ---------------------------------- */