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Hand writing science formulas on chalkboard

Stock Photo:
Image ID: 91777328
Release Information: N/A
Copyright: MR.LIGHTMAN
Small
500x500 6.9"x6.9" (72dpi) 353 KB
Med
1000x1000 3.3"x3.3" (300dpi) 1.1 MB
Large
4500x4500 15.0"x15.0" (300dpi) 8.2 MB
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