User:Zrs 12/sandbox

Hello, welcome to my sandbox. Feel free to mess around and test your editing skills. When you are finished, or if you are here by accident here are links back to my user page and the Wikipedia main page. How about taking the Wikipediholism test?

$\mathbf {I} =\iiint _{V}\rho (x,y,z)\left((x^{2}+y^{2}+z^{2})\mathbf {E} _{3}-{\begin{bmatrix}xx&xy&xz\\yx&yy&yz\\zx&zy&zz\end{bmatrix}}\right)\,dx\,dy\,dz$