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close up of math formulas on a blackboard

Stock Photo:
Image ID: 116212201
Release Information: N/A
Copyright: Picsfive
Small
500x310 6.9"x4.3" (72dpi) 148 KB
Med
1000x619 3.3"x2.1" (300dpi) 581 KB
Large
7162x4436 23.9"x14.8" (300dpi) 28.1 MB
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