Which Points difference has Played of 32, and Points for of 840?
CREATE TABLE "2004_05_table" (
  "club" text,
  "played" text,
  "drawn" text,
  "lost" text,
  "points_for" text,
  "points_against" text,
  "points_difference" text,
  "points" text
);
SELECT "points_difference" FROM "2004_05_table" WHERE "played"='32' AND "points_for"='840';