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teacher hand writing high school maths and science formula on blackboard

Stock Photo:
Image ID: 105507167
Release Information: N/A
Copyright:
Small
500x463 6.9"x6.4" (72dpi) 256 KB
Med
1000x925 3.3"x3.1" (300dpi) 741 KB
Large
4000x3700 13.3"x12.3" (300dpi) 6.6 MB
Super
8000x7400 26.7"x24.7" (300dpi) approx.16.4 MB
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