CREATE TABLE table_name_13 (league_cup_apps VARCHAR(255), total_apps VARCHAR(255), position VARCHAR(255), league_goals VARCHAR(255))
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)"