Ключевые слова: 2018, answer, background, banner, beautiful, black, blur, bokeh, brochure, celebrate, celebration, change, christmas, clock, cold, countdown, decoration, discount, education, equation, fall, festival, festive, fir, fun, future, gray, happy, holiday, mathematics, merry, minus, moment, montage, move, natural, nature, newyear, number, plus, question, school, season, solution, task, vintage, winter, xmas, year,