What's the sum of sign with more than 53 bits precision, double extended (80-bit) type, and more than 80 total bits?
CREATE TABLE "internal_representation" (
  "type" text,
  "sign" real,
  "exponent" real,
  "significand" real,
  "total_bits" real,
  "exponent_bias" real,
  "bits_precision" real,
  "number_of_decimal_digits" text
);
SELECT SUM("sign") FROM "internal_representation" WHERE "bits_precision">53 AND "type"='double extended (80-bit)' AND "total_bits">80;