Schema: CREATE TABLE table_name_13 (league_cup_apps VARCHAR, total_apps VARCHAR, position VARCHAR, league_goals VARCHAR)
Question: What is the league cup apps when the league goals are greater than 3, there are 30 (2) total apps, and has a position of mf?
SQL: SELECT league_cup_apps FROM table_name_13 WHERE position = "mf" AND league_goals > 3 AND total_apps = "30 (2)"