Homme d'affaires calculant sur un tableau noir - Photo & image de stock

Super high IQ kid doing a complex calculation mathematics on a black chalkboard. High intelligent child.

Portrait of male teacher at work

Handsome young school boy thinking about complex mathematical signs

Young man writing on blackboard

Calculations on the board

Portrait of caucasian senior teacher

Portrait of young teacher at work

Caucasian teacher and class background

Man's hand writing some calculations on a blackboard

Student yawning with a written board behind him

Concentrated businessman sitting beside a blackboard with complicated calculations on it

Businessman with a laptop and mathematical operations behind him

Young businessman writing on a blackboard

Young businessman writing some calculations on a blackboard

Teacher doing a lesson

Bold man talking on a telephone box

Businessman standing beside a blackboard with some calculations