Pre difine variables:

a=5/4;
b=2*pi;

Equations:

X = a*(1-v/b)*cos(2*v)*(1+cos(u))+cos(2*v)
Y = a*(1-v/b)*sin(2*v)*(1+sin(u))+sin(2*v)
Z = 10*v/b+a*(1-v/b)*sin(u)+15