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All FilesAll Files| Contributor: | |
| Keywords: | Education, School, Blackboard, Classroom, Teenager, Writing, Teaching, Student, Mathematical Symbol, Mathematics, Science ...more |
| Downloads: |
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| Views: | 1577 |
| Uploaded on: | 08-16-09 © vesperstock |
| Also in: | 2 Lightboxes |
| Source codec: | HD: Photo JPEG |
| Length: | 29.53 seconds |
| Anamorphic: | No |
