The formula of water in the form of drops on a light backgroundThe formula of water in the form of drops on a light background
Albert einstein on the background of a blackboard with formulas written on itAlbert Einstein on the background of a blackboard with formulas written on it
A blonde in white shorts and brown boots is holding on to a stump with one handA blonde in white shorts and brown boots is holding on to a stump with one hand
A white stripe, then a black one, then two white onesA white stripe, then a black one, then two white ones