사진
Albert Einstein math whiteboard b = 72
@felix_p님의 사진· Jun 15, 2026· Albert Einstein
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Albert Einstein stands in front of a whiteboard holding a marker. He wears a gray tweed three-piece suit with a dark tie and has his left hand in his pocket. The board shows the equations a × a = 36, b − a = 36, and b = ? with a green “CLASSROOM RULES” poster visible on the wall to the right. Two thick textbooks rest on the desk in the foreground.
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