File:Detail-53389.jpg
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A man in his 60s, with grey hair and glasses, standing in front of a chalkboard filled with mathematical equations.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:52, 15 December 2023 | | 1,024 × 1,024 (961 KB) | Ai (talk | contribs) | A man in his 60s, with grey hair and glasses, standing in front of a chalkboard filled with mathematical equations. |
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