| Giver | Post | Date |
| pyroabhi | Re: If x is a member of the set {a, b, c, d}, where a, b, c, and d are the | 13-Jan-2024 |
| Sri07 | Re: If x is a member of the set {a, b, c, d}, where a, b, c, and d are the | 28-Jan-2021 |
| gmatter0913 | Re: If x is a member of the set {a, b, c, d}, where a, b, c, and d are the | 27-Sep-2013 |