Hand holding a megaphone with a formula

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Size: 4250px × 2823px
Photo credit: © Fabio Balbi / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: ad, blackboard, business, chalkboard, classroom, concept, conference, draw, education, formula, genius, intelligence, learn, mathematic, maths, megaphone, message, mind, news, notice, number, opportunity, school, solution, speak, success, talk, texture, work, write