︠a27fb4ea-fa38-4fdc-98d4-de540dcf8b8as︠ var('u, v') show(parametric_plot3d([u^2 + v^2, u, v], (u, -1, 1), (v, -1, 1))) ︡c6ce3e04-79f7-4508-ace1-8a0df448e5f9︡{"stdout":"(u, v)"}︡{"stdout":"\n"}︡{"file":{"filename":"c9f8353b-d4d3-461c-9a7a-98d2f2bddd47.sage3d","uuid":"c9f8353b-d4d3-461c-9a7a-98d2f2bddd47"}}︡{"done":true} ︠d67e4943-fa8f-4f27-a494-a85cd13bced6︠