This is an example of a display of an equation. I have incorporated MathJax hooks and hope this works ok. For starters I will just display a single equation. This is the continuity equation for the density $$\rho$$ with velocity field $$\mathbf{ v}$$:

$\partial_{t} \rho + \nabla \cdot \left( \rho \mathbf{v} \right) = 0$

When $$a \ne 0$$, there are two solutions to $$ax^2 + bx + c = 0$$ and they are
$x = {-b \pm \sqrt{b^2 -4ac} \over 2a}.$