Cheerful positive thinking young man engineer wearing protective helmet showing index finger pointed up showing chalk written mathematics formulas and

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Cheerful positive thinking young man engineer wearing protective helmet showing index finger pointed up showing chalk written mathematics formulas and equations over blackboard. Education concept.

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Size: 6000px × 4000px
Photo credit: © Bulat Silvia / Alamy / Afripics
License: Royalty Free
Model Released: Yes

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