{
  "title": "Expand (a+b)^2",
  "origin_url": "https://www.nikhef.nl/~form/maindir/documentation/tutorial/online/online.html",
  "license_guess": null,
  "code_sha256": "2535e3bf8ddf0c21f7e9f84a2fac3d681b9d79a04cf4f1a2dac174309d9aaebd",
  "added_at": "2026-02-08T15:00:11Z"
}