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Math formula written on blackboard with chalk.

Stock Photo:
Image ID: 120045292
Release Information: N/A
Copyright: Africa Studio
Small
500x334 6.9"x4.6" (72dpi) 210 KB
Med
1000x667 3.3"x2.2" (300dpi) 850 KB
Large
5184x3456 17.3"x11.5" (300dpi) 11.4 MB
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