http://likest.ru/ ///////////http://www.xlikes.ru/help/services/groups/////////////////////////////http://prcr.org/tasks/vk/
5 + (-sqrt(1-x^2-(y-abs(x))^2))*cos(30*((1-x^2-(y-abs(x))^2))), x is from -1 to 1, y is from -1 to 1.5, z is from 1 to 6