| Giver | Post | Date |
| sindhuss | For the unknown constants a, b, c, d, and e, abc = 0; bcd = | 02-Nov-2023 |
| LisaP | For the unknown constants a, b, c, d, and e, abc = 0; bcd = | 02-Apr-2021 |
| andresgalanc | For the unknown constants a, b, c, d, and e, abc = 0; bcd = | 13-Oct-2020 |