EXP_…$

select
   exh.exp_id      , -- expression id
   obj.object_name ,
   obj.owner       ,
   obj.object_type ,
   exh.objn        , -- table object number of the expression
   exh.sub_id      , -- entry-leve number of a package function  
   exh.fixed_cost  , -- fixed cost of an expression
   exh.text        , -- expression text
   exh.col_list    , -- List of columns seen in the expression
   exh.flags       ,
   exh.ctime         -- Creation time
from
   exp_head$   exh                               left join
   dba_objects obj on exh.objn = obj.object_id
order by
   ctime desc;

select
   exo.objn        , -- table/partition obj# of the expression
   obj.object_name ,
   obj.owner       ,
   obj.object_type ,
   exo.snapshot_id ,
   exo.exp_cnt       -- number of expressions for the object */
from
  exp_obj$    exo                               left join
  dba_objects obj on exo.objn = obj.object_id;

select
  exp_id                , -- expression id
  objn	                , -- lowest level object number (i.e. partition level)
  dynamic_cost          , -- dynamic cost of an expresion
  eval_count            , -- expression evaluation frequency */
  snapshot_id           ,
  ctime                 , -- creation timestamp
  last_modified         ,
  update_count            -- update frequency
from
  exp_stat$

select * from exp_service$;