/* ---------------------------------- */
/* save as fb.h                    */
/* ---------------------------------- */
double f(
double x,
double y,
double z)
{
        return( (y*y*sin(x) + y*exp(2*z)) );
}
char  feq[] =   "y**2*sin(x) + y*exp(2*z)";

/* ---------------------------------- */
/* ---------------------------------- */
double M(
double x,
double y,
double z)
{
        return( (y*y*cos(x)) );
}
char  Meq[] =  "(y**2*cos(x))";
/* ---------------------------------- */
double N(
double x,
double y,
double z)
{
        return(   (2*y*sin(x) + exp(2*z)) );
}
char  Neq[] =  "(2*y*sin(x) + exp(2*z))";
/* ---------------------------------- */
double P(
double x,
double y,
double z)
{
        return(   (2*y*exp(2*z)) );
}
char  Peq[] =  "(2*y*exp(2*z))";
/* ---------------------------------- */
/* ---------------------------------- */
double g(
double t)
{
        return( (1./2.*t*PI));
}
char  geq[] =  "1/2*t*Pi";
/* ---------------------------------- */
double h(
double t)
{
        return((2*t+1));
}
char  heq[] =  "2*t+1";
/* ---------------------------------- */
double k(
double t)
{
        return( (1.5*t+.5));
}
char  keq[] =  "1.5*t+.5";
/* ---------------------------------- */
/* ---------------------------------- */