Doctor borroso con la pluma de fieltro y las fórmulas químicas de la escritura del portapapeles en tablero de cristal - Foto e imágenes de stock

Low angle view of scientist with felt pen near blurred formulas on glass board

Brunette doctor in white coat writing chemical formulas on glass board in lab

Background image female scientist makes a report to colleagues

Low angle view of blurred chemist holding clipboard and felt pen near chemical formulas on glass board

Background image female scientist makes a report to colleagues

Background image female scientist makes a report to colleagues

View through the transparent Board. female scientist makes a report to colleagues. concept of research

View through the transparent Board. female scientist makes a report to colleagues. concept of research

Teacher pointing at math formulas on chalkboard during online lesson in class

Teacher holding laptop during online lesson near chalkboard with math formulas in class

Happy teacher holding chalk near mathematic formulas on chalkboard

Positive teacher holding chalk and laptop near chalkboard in school

Teacher talking near blurred digital camera and chalkboard with math formulas in classroom

Smiling teacher holding chalk and laptop near math formulas on chalkboard

Positive teacher pointing at blurred chalkboard with math formulas near digital camera in school

Teacher holding chalk near blurred digital camera and chalkboard in class

Teacher pointing at math formulas on chalkboard and holding laptop during online lesson in classroom