The sum $\quad\sum_{n=1}^\infty n\quad$ is equal to $-\frac{1}{12}$. On the other hand, the integral $\int_0^\infty e^{-x^2} dx = \frac12 \pi^{1/2}$.
Displayed equations should be possible with single dollars inside blackquote.../blockquote:
$\tau\to \tau^\prime = \frac{a \tau + b}{c \tau+ d}, \quad \left(\begin{array}{cc}a&b\\ c&d\end{array}\right)\in SL(2,Z)$Note that before the page fully loads, you see the LaTeX sources. But suddenly, they should be converted into beautiful mathematics if you have installed either MathPlayer or Techexplorer.
