What digital reaction has a hot 100 reaction of 4 (+4)?
CREATE TABLE "guest_performances" (
  "week" text,
  "performer_s" text,
  "hot_100_reaction" text,
  "hot_digital_songs_reaction" text,
  "notes" text
);
SELECT "hot_digital_songs_reaction" FROM "guest_performances" WHERE "hot_100_reaction"='4 (+4)';