V šatně je střela z tabule, někdo píše Café Latte, cappuccino, espresso - Stock záběry a video

Template of a coffee-shop menu on the chalkboard with blank space for costs, cafe latte, cappuccino, espresso and dollar signs are written

This formula is a special case of a formula of Newton-Leibniz. It allows to connect two major transactions of the mathematical analysis , differentiation and integration.

Dirac's delta function. Delta function is actually not function, but the generalized function. The provided integral can be used as her definition. Such functions are very actively used in physics.

Definition of number e as limit of some numerical sequence. We write a mathematical formula.

Writing a trigonometric formula on the blackboard with white chalk

Formula for exhibitors. Representation exhibitors in the form of a row. We write a mathematical formula.

Template of a coffee-shop menu on the chalkboard with blank space for costs, cafe latte, cappuccino, espresso and dollar signs are written

Someone is writing Sale on the chalkboard with lines around it

Closeup shot of a coffeehouse menu on the chalkboard, someone is erasing prices for coffee and writing new figures

Someone is writing word Sale on the chalkboard and underlining it

Three stick figures are drawn on the chalkboard and circled with blank space nearby, family concept

Someone is writing dollar sign on the white paper using lead pencil