(45*cos(t))-(6.5*cos(t+atan(sin((1-16)*t)/((45/(1.5*16))-cos((1-16)*t)))))-(1.5*cos(16*t))
(-45*sin(t))+(6.5*sin(t+atan(sin((1-16)*t)/((45/(1.5*16))-cos((1-16)*t)))))+(1.5*sin(16*t))

(25*cos(t))-(3*cos(t+atan(sin((1-6)*t)/((25/(0.75*6))-cos((1-6)*t)))))-(0.75*cos(6*t))
(-25*sin(t))+(3*sin(t+atan(sin((1-6)*t)/((25/(0.75*6))-cos((1-6)*t)))))+(0.75*sin(6*t))

(25*cos(t))-(5*cos(t+atan(sin((1-11)*t)/((25/(1.25*11))-cos((1-11)*t)))))-(1.25*cos(11*t))
(-25*sin(t))+(5*sin(t+atan(sin((1-11)*t)/((25/(1.25*11))-cos((1-11)*t)))))+(1.25*sin(11*t))

(45*cos(t))-(6*cos(t+atan(sin((1-16)*t)/((45/(1.5*16))-cos((1-16)*t)))))-(1.5*cos(16*t))
(-45*sin(t))+(6*sin(t+atan(sin((1-16)*t)/((45/(1.5*16))-cos((1-16)*t)))))+(1.5*sin(16*t))

R = 20, E = 1.5, Rr = 3, N = 10
(20*cos(t))-(3*cos(t+atan(sin((1-10)*t)/((20/(1.5*10))-cos((1-10)*t)))))-(1.5*cos(10*t))
(-20*sin(t))+(3*sin(t+atan(sin((1-10)*t)/((20/(1.5*10))-cos((1-10)*t)))))+(1.5*sin(10*t))

X = (R*cos(t))-(Rr*cos(t+arctan(sin((1-N)*t)/((R/EN)-cos((1-N)*t)))))-(E*cos(N*t))
Y = (-R*sin(t))+(Rr*sin(t+arctan(sin((1-N)*t)/((R/EN)-cos((1-N)*t)))))+(E*sin(N*t))