The general language
http://reference.wolfram.com/language/
Sorry to be unclear. I want to know the set of of Wolfram Language statements supported.
A plain list will do fine.
Nice, but an an answer to the question would be nicer :)
Wolfram|Alpha understands mostly short natural language queries and just simple Wolfram Language syntax. For advanced code pieces use free version of Wolfram Programming Cloud.
Wolfram Alpha doesn't understand that either. It responds: "Showing instead result for query: x^2 + y^2 + z^2 == 1".
ContourPlot3D[x^2 + y^2 + z^2 == 1, {x, -1, 1}, {y, -1, 1}, {z, -1, 1}, Mesh -> True]
