User contributions
- 15:36, 18 January 2019 (diff | hist) . . (-1) . . 2100: Models of the Atom (→Explanation: Typo)
- 16:51, 12 November 2018 (diff | hist) . . (+121) . . 2070: Trig Identities (In the Insect identity, the "s" to "t" could be 'seconds' to 'time.')