User contributions
- 01:14, 4 May 2022 (diff | hist) . . (-247,494) . . 1201: Integration by Parts (Undo revision 232620 by X. K. C. D. (talk))
- 01:06, 4 May 2022 (diff | hist) . . (-245,771) . . 1693: Oxidation (Undo revision 232619 by X. K. C. D. (talk))