CREATE TABLE table_72103 ("Season" TEXT, "Competition" TEXT, "Round" TEXT, "Opponents" TEXT, "1st leg" TEXT, "2nd leg" TEXT, "Aggregate" TEXT)

what's the competition where aggregate is 4 7
SELECT "Competition" FROM table_72103 WHERE "Aggregate" = '4–7'
SELECT "Competition" FROM "table_72103" WHERE "Aggregate" = '4–7'