+int tbl_cdata(struct tbl_node *, int, const char *);
+const struct tbl_span *tbl_span(struct tbl_node *);
+void tbl_end(struct tbl_node **);
+struct eqn_node *eqn_alloc(const char *, int, int, struct mparse *);
+enum rofferr eqn_end(struct eqn_node **);
+void eqn_free(struct eqn_node *);
+enum rofferr eqn_read(struct eqn_node **, int,
+ const char *, int, int *);