︠624f328c-c8ec-4b7b-92aa-d729541eda49s︠ #7.4.1 var("y") plot3d(x^2+y^2, (x,-4,4), (y,-4,4), axes_labels=("x","y","z")) + point3d((3,0,1), color="red") ︡4496e644-5734-4ec5-a20f-be6bc4e77c11︡{"stdout":"y\n"}︡{"file":{"filename":"b27a7819-506a-4de3-b7b8-09992f450333.sage3d","uuid":"b27a7819-506a-4de3-b7b8-09992f450333"}}︡{"done":true} ︠dc56123e-9743-4c45-82f6-73d92011d4d6︠