Stock image Mathematical formula e=mc2 squared written on a blue, relatively dirty chalkboard by chalk. Located in the upper left corner of the image making space for some message or note on the board.
Published: Oct.16, 2019 07:44:10
Author: tookitook
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File type: image / jpg
File size: 10.14 MB
Orginal size: 4000 x 3000 px
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Level: beginner
