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Mathematical formulas. Maths. Scientific and educational concept. Science.

Maths problem at a rather run-down green-board, written in chalk

An elderly professor of mathematics stands in his office at a white board with notes and explains the material to students.

His mind works differently to many

Frustrated senior teacher standing in front of a chalk board.

Portrait of happy school teacher man wearing protective face mask smiling and looking at camera posing while writing on white blackboard while teaching mathematic in a high school classroom in COVID-19 outbreak at reopen schools after coronavirus quarantine and lockdown

Physics teacher writing math equations on a blackboard â complex mathematics concepts

$young smart female teacher in university writing biology formulas on the huge blackboard$

Mathematical formula on a black chalkboard. Calculation and Equation.

5G and AI technology, Global communication network concept. Business graph. Global business.

Sheet of paper with many different mathematical formulas

Newton's Equations. Rear view, close-up on young man standing back against green chalkboard. He explains, solves physics tasks, retro style. Processing for retro bleached look, slight vignette added.

Maths lesson. The boy answering at the maths lesson and writing on the board

Working time on green board

New Jersey

Side view of young teacher with short dark curly hair writing down equation on blackboard while explaining it to students

Human head with mathematical seamless pattern on white background

Science, Math, Chemistry Equations

$Mature teacher explaining mathematics at chalkboard in classroom$

Sacramento, California, USA - March 19, 2011: 1956 Israel postage stamp with a portrait of Albert Einstein to the right of his E=mc2 equation.

Concept of school and education with blackboard

Portrait of mature adult teacher in front of green chalkboard. He is looking at camera and wearing a white lab coat and a yellow necktie.. Math formulas are written on blackboard. Shot in door with a medium format camera.

Titanium and symbol structural formula chemical on the blackboard, Chemistry in the classroom

back to school, study

Science teacher writting at blackboard. Education and physics.

Chalkboard with many different math formulas on white wall

a full school blackboard full of equations

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