Re: LaTeX

You don't want to manually set the size for the (),[],{},|| atleast not
yet=) Try this out.

\left( \right) sets the sizes according to the equations.


\begin{eqnarray}
\frac{d^2f}{dx^2} =- \left(\frac{2\pi}{\lambda}\right)^2 f(x)\\
\nonumber
\frac{d^2f}{dx^2} =- \left(\frac{2\pi}{\lambda}\right)^2 f(x)
\end{eqnarray}