Astronomical calculations, formulas on a black backgroundAstronomical calculations, formulas on a black background
Coat of arms of an eagle with two heads on a gray backgroundCoat of arms of an eagle with two heads on a gray background
Blue-yellow flag of ukraine and the coat of arms of ukraine on the flagBlue-yellow flag of Ukraine and the coat of arms of Ukraine on the flag
Rusty coat of arms of the ussr with hammer and sickleRusty coat of arms of the USSR with hammer and sickle
A flowing waterfall on the background of autumn multicolored leavesA flowing waterfall on the background of autumn multicolored leaves
Poster with the wish of a happy holiday for the new year two thousand of the fifteenth yearPoster with the wish of a happy holiday for the new year two thousand of the fifteenth year