3535.sagews

circle((1,1), 2, rgbcolor=(0,0,1))

a = circle((0,0), 1, rgbcolor=(0,1,0)) 
a.show (aspect_ratio=1) 
a.show (axes=false , aspect_ratio=1)

a = circle((2,2), 1, rgbcolor=(1,0,0), fill=True) 
b = circle((1,1), 0.5, rgbcolor=(0,0,1)) 
show (a+b,aspect_ratio=1)

plot(x^3, (x,-2,4))

a=plot(e^(-1/2*x)*cos(2*pi*x),(x,0,6),rgbcolor=(1,1,0)) 
b=plot(e^(-1/2*x), (x,0,6),rgbcolor=(0,1,0)) 
show(a+b)