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Pen and a mathematical exercise (calculations are real and solved correctly)

Stock Photo:
Image ID: 39902731
Copyright:
Small
500x325 6.9"x4.5" (72dpi) 199 KB
Med
1000x650 3.3"x2.2" (300dpi) 669 KB
Large
2500x1624 8.3"x5.4" (300dpi) 2.1 MB
Super
5000x3248 16.7"x10.8" (300dpi) approx.5.5 MB
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