Calculate the Laplacian ∇2f\nabla^2 f∇2f of f(x,y,z)=x3+y3+z3f(x, y, z) = x^3 + y^3 + z^3f(x,y,z)=x3+y3+z3.
3x+3y+3z3x + 3y + 3z3x+3y+3z
6x+6y+6z6x + 6y + 6z6x+6y+6z
000
6(x+y+z)26(x+y+z)^26(x+y+z)2