Formulas in chalk on a blackboard in the form of abstractionFormulas in chalk on a blackboard in the form of abstraction
The picture is an abstraction of blue blue and redThe picture is an abstraction of blue blue and red
Abstraction in the form of a white canvas and colored ballsAbstraction in the form of a white canvas and colored balls
A picture with a bright shape on a gray backgroundA picture with a bright shape on a gray background