### Exponentiation With Error Estimate

Function: int gsl_sf_exp_err_e (double x, double dx, gsl_sf_result * result)
  This function exponentiates x with an associated absolute error dx.

Function: int gsl_sf_exp_err_e10_e (double x, double dx, gsl_sf_result_e10 * result)
  This functions exponentiate a quantity x with an associated absolute error dx using the `gsl_sf_result_e10` type to return a result with extended range.

Function: int gsl_sf_exp_mult_err_e (double x, double dx, double y, double dy, gsl_sf_result * result)
  This routine computes the product y \exp(x) for the quantities x, y with associated absolute errors dx, dy.

Function: int gsl_sf_exp_mult_err_e10_e (double x, double dx, double y, double dy, gsl_sf_result_e10 * result)
  This routine computes the product y \exp(x) for the quantities x, y with associated absolute errors dx, dy using the `gsl_sf_result_e10` type to return a result with extended range.