On a dark gray blackboard, many mathematical formulas are written in chalkOn a dark gray blackboard, many mathematical formulas are written in chalk
A blooming branch of an apple tree on the background of a treeA blooming branch of an apple tree on the background of a tree
Motherboard with microchips for electronic devicesMotherboard with microchips for electronic devices
Oriental sweets, nougat with pistachio, still lifeOriental sweets, nougat with pistachio, still life