Coordinates: Cartesian
x ( u, v, t)= 5*cos(u)*cos(u+v); y ( u, v, t)= 4*sin(v)*sin(u+v); z ( u, v, t)=6*v;
Domain of variables:min U: -8, maxU: 8, steps:100; min V: -8, maxV: 8, steps: 100;