anchor.diff:  
       exit(Client, unit_testing),
   
  -    receive after 4 -> ok end,
  +    receive after 4 ->
  +		    ok
  +	    end,
   
       ?assertNot(is_process_alive(ServerPid)),
       ?assertEqual(undefined, whereis(?math_server)),
  
positive.code: 
      sum_areas(Shapes, Client),
  
      receive after 4 -> ok end,
      exit(Client, unit_testing),
      aftereach().
  
  
negative.code: 
  start_test() ->
      {ok, _Pid} = start(),
  
      ?assert(is_process_alive(whereis(?math_server))),
  
      aftereach().
  
  already_started_test() ->
      {ok, _Pid} = start(),
  
      Result = case catch start() of
  		 M ->
  