User contributions
(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)
- 12:30, 16 June 2019 (diff | hist) . . (+45) . . Newton
- 18:41, 13 January 2019 (diff | hist) . . (+60) . . Subtraction
- 18:34, 13 January 2019 (diff | hist) . . (+71) . . Equal
- 18:32, 13 January 2019 (diff | hist) . . (+18) . . m Abacus
- 18:31, 13 January 2019 (diff | hist) . . (+74) . . Arithmetic
- 22:22, 1 November 2018 (diff | hist) . . (+14) . . Proofs without words (→Geometric Series)
(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)