Plot3D

Plot3D[f,{x,xmin,xmax},{y,ymin,ymax}] generates a three-dimensional plot of f as a function of x and y. 

Plot3D[{f1,f2,…},{x,xmin,xmax},{y,ymin,ymax}] plots several functions. 

Plot3D[{…,w[fi],…},…] plots fi with features defined by the symbolic wrapper w.

Plot3D[…,{x,y}∈reg] takes variables {x,y} to be in the geometric region reg. 

Please visit the official Wolfram Language Reference for more details and examples on core symbols.