Rantonels has a wordpress trick (used here) to display LaTeX formula as an image: see his wp blog post
and Wordpress LaTeX support Thus javascript is not needed for mathjax.js to work. But is it legit if page is not hosted on wordpress?
MathJax tutorial and quick reference
See: MathJax Getting Started:
When \(a \ne 0\), there are two solutions to \(ax^2 + bx + c = 0\) and they are \(x = {-b \pm \sqrt{b^2-4ac} \over 2a}.\)
You can test this online using jsbin.com but it renders fine locally in file mode (without local web server)
$$\left [ - \frac{\hbar^2}{2 m} \frac{\partial^2}{\partial x^2} + V \right ] \Psi = i \hbar \frac{\partial}{\partial t} \Psi$$
$$f(a) = \frac{1}{2\pi i} \oint\frac{f(z)}{z-a}dz$$
$$\vec{\nabla} \times \vec{F} = \left( \frac{\partial F_z}{\partial y} - \frac{\partial F_y}{\partial z} \right) \mathbf{i} + \left( \frac{\partial F_x}{\partial z} - \frac{\partial F_z}{\partial x} \right) \mathbf{j} + \left( \frac{\partial F_y}{\partial x} - \frac{\partial F_x}{\partial y} \right) \mathbf{k}$$
$$\sigma = \sqrt{ \frac{1}{N} \sum_{i=1}^N (x_i -\mu)^2}$$
$$\hbar \frac{\partial}{\partial t} \Psi = \hat H\Psi$$
$$ \lim_{x \to +\infty} \frac{3x^2 +7x^3}{x^2 +5x^4} = 3 $$
These examples use inline LaTeX.
\(\ddot a\) : \ddot a to put a double dot over a, and \(\vec a\) to put a little arrow over a.
\(\bar a\) : \bar a to put an overbar over a | \(\tilde a\) : \tilde a to put '~' over a
\(\hat a\) : \hat a to put '^' over a | \(\dot a\) : \dot a to put a single dot over a
PhysicsForums Reference \(\Lambda^\mu_\nu,\ \Lambda_\nu^\mu,\ \Lambda^\mu{}_\nu,\ \Lambda_\nu{}^\mu\) and \(\lim_{n\rightarrow +\infty} {\frac{\sin(x)}{x}}\)