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Hand with marker writing formulas and equations.

Stock Photo:
Image ID: 99557060
Release Information: N/A
Copyright:
Small
500x416 6.9"x5.8" (72dpi) 139 KB
Med
1000x831 3.3"x2.8" (300dpi) 437 KB
Large
5158x4288 17.2"x14.3" (300dpi) 4.2 MB
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