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blackboard with complicated math formulas

Stock Photo:
Image ID: 129429947
Copyright:
Small
500x334 6.9"x4.6" (72dpi) 197 KB
Med
1000x667 3.3"x2.2" (300dpi) 703 KB
Large
4096x2731 13.7"x9.1" (300dpi) 5.1 MB
Super
8192x5462 27.3"x18.2" (300dpi) approx.16.9 MB
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