$\mathrm{VectorCalculus}\left[\mathrm{SetCoordinates}\right]\left(\mathrm{cartesian}\left[x\,y\,z\right]\right)\:$

$\mathrm{VectorCalculus}\left[\mathrm{VectorField}\right]\left(⟨x^2\,y^2\,z^2⟩\right)$

$\left(x^2\right){\stackrel{\_}{e}}_x\+\left(y^2\right){\stackrel{\_}{e}}_y\+\left(z^2\right){\stackrel{\_}{e}}_z$

$\mathrm{VectorCalculus}\left[\mathrm{LineInt}\right]\left(\,\mathrm{Line}\left(⟨1\,2\,3⟩\,⟨4\,5\,0⟩\right)\right)$

$51$