How much Long has a Loss larger than 2, and a Gain of 157, and an Avg/G smaller than 129?
CREATE TABLE "rushing" (
  "name" text,
  "gain" real,
  "loss" real,
  "long" real,
  "avg_g" real
);
SELECT SUM("long") FROM "rushing" WHERE "loss">2 AND "gain"=157 AND "avg_g"<129;