This is an experiment to see how the WordPress $\LaTeX$ plugin works.  What better equation to try out than the Euler-Lotka equation:

$$1 = \int_{\alpha}^{\beta} e^{-ra} l(a)m(a) da$$

where $\alpha$ is age at first reproduction, $\beta$ is age at last reproduction, $r$ is the intrinsic rate of population increase, $l(a)$ is the proportion surviving to exact age $a$, and $m(a)$ is the fertility rate of women age $a.$