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Teacher writing a mathematical equation on a glass screen. The background is a uniform color all over so you can increase the copy space easily. Focus is on his hand and pen.

Stock Photo:
Image ID: 41601484
Release Information: Signed model release filed with Shutterstock, Inc
Copyright:
Small
500x334 6.9"x4.6" (72dpi) 107 KB
Med
1000x667 3.3"x2.2" (300dpi) 316 KB
Large
5054x3370 16.8"x11.2" (300dpi) 3.3 MB
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