+ insert_fcn_help("exp", "exponential function");
+ insert_fcn_help("factorial", "factorial function");
+ insert_fcn_help("gamma", "gamma function");
+ insert_fcn_help("log", "natural logarithm");
+ insert_fcn_help("psi", "psi function\npsi(x) is the digamma function, psi(n,x) the nth polygamma function");