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Teacher or college professor with a light bulb head in front of a chalkboard with complex math problems.

Stock Photo:
Image ID: 131558096
Release Information: N/A
Copyright:
Small
500x334 6.9"x4.6" (72dpi) 147 KB
Med
1000x667 3.3"x2.2" (300dpi) 459 KB
Large
3600x2400 12.0"x8.0" (300dpi) 3.1 MB
Super
7200x4800 24.0"x16.0" (300dpi) approx.8.6 MB
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