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179446856
- Id: 179446856
- Media type: Photography
- Author: silverkblack
- Keywords:
sign board man formula school complex professional drawing education chemical chemist lab laboratory learn study confusion glasses college student University chemistry lesson knowledge write theory teach scientific mathematics teacher professor blackboard algebra scribble calculate chalk confused scientist lecture math researcher chalkboard physic equation trigonometry chemistry equation
Categories
| Size | Width | Height | Mp |
|---|---|---|---|
| s | 500 px | 281 px | 0.5 |
| m | 1000 px | 563 px | 2 |
| l | 2000 px | 1125 px | 8 |
| xl | 3840 px | 2160 px | 15 |
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