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Scientific calculator and pen on notebook paper with nuclear reactions formulas

Stock Photo:
Image ID: 73312477
Copyright:
Small
500x375 6.9"x5.2" (72dpi) 270 KB
Med
1000x750 3.3"x2.5" (300dpi) 922 KB
Large
3067x2300 10.2"x7.7" (300dpi) 4.9 MB
Super
6134x4600 20.4"x15.3" (300dpi) approx.13.9 MB
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