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159330638
- Id: 159330638
- Media type: Photography
- Author: vchalup2
- Keywords:
person human young people portrait man formula school think exam learning education science problem solution hard study thinking college student University lesson knowledge physics theory solve teaching thoughtful mathematics teacher blackboard mathematical classroom mathematic confused calculation calculating solving compute unsure math uncertain academic problematic equation
Categories
| Size | Width | Height | Mp |
|---|---|---|---|
| s | 500 px | 333 px | 0.5 |
| m | 1000 px | 667 px | 2 |
| l | 2000 px | 1333 px | 8 |
| xl | 6000 px | 4000 px | 15 |
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