<reponame>oscarbenjamin/sympy_doc
plot3d((x**2 + y**2, (x, -5, 5), (y, -5, 5)),
    (x*y, (x, -3, 3), (y, -3, 3)))
# Plot object containing:
# [0]: cartesian surface: x**2 + y**2 for x over (-5.0, 5.0) and y over (-5.0, 5.0)
# [1]: cartesian surface: x*y for x over (-3.0, 3.0) and y over (-3.0, 3.0)

plot3d((x**2 + y**2, (x, -5, 5), (y, -5, 5)),
    (x*y, (x, -3, 3), (y, -3, 3)))
# Plot object containing:
# [0]: cartesian surface: x**2 + y**2 for x over (-5.0, 5.0) and y over (-5.0, 5.0)
# [1]: cartesian surface: x*y for x over (-3.0, 3.0) and y over (-3.0, 3.0)
# Plot object containing: # [0]: cartesian surface: x**2 + y**2 for x over (-5.0, 5.0) and y over (-5.0, 5.0) # [1]: cartesian surface: x*y for x over (-3.0, 3.0) and y over (-3.0, 3.0)