Lecture with formulas on the blackboard in front of studentsLecture with formulas on the blackboard in front of students
A tropical waterfall with a spray cloud on the background of the skyA tropical waterfall with a spray cloud on the background of the sky
The famous painting "starry night" by the dutch artist van gogh, depicting the night descending on the city The famous painting "Starry Night" by the Dutch artist Van Gogh, depicting the night descending on the city
Bright flowers on the background of a thunderstormBright flowers on the background of a thunderstorm
Drawing of a man and a girl ready to fight on the great wall of chinaDrawing of a man and a girl ready to fight on the Great Wall of China