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teacher / student writing math formulas on the chalkboard

Stock Photo:
Image ID: 60787957
Release Information:
Signed model release filed with Shutterstock, Inc
Copyright: s-ts
Small
500x326 6.9"x4.5" (72dpi) 191 KB
Med
1000x652 3.3"x2.2" (300dpi) 705 KB
Large
3887x2536 13.0"x8.5" (300dpi) 10.1 MB
Super
7774x5072 25.9"x16.9" (300dpi) approx.40.1 MB
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