If the equation is  6 × 9² + 6 × 9 + 6, what is the 2nd throw?
CREATE TABLE "0_728_throw_3_times" (
  "1st_throw" real,
  "2nd_throw" real,
  "3rd_throw" real,
  "equation" text,
  "result" real
);
SELECT MAX("2nd_throw") FROM "0_728_throw_3_times" WHERE "equation"='6 × 9² + 6 × 9 + 6';