int run_command_simplify(const char *arg);
int run_command_explain(const char *arg);
int run_command_declare(const char *cmdarg);
void print_error(const char *fmt, ...);
int run_command_simplify(const char *arg);
int run_command_explain(const char *arg);
int run_command_declare(const char *cmdarg);
void print_error(const char *fmt, ...);