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This page is for testing the wiki.
[math]\displaystyle{ \[ \int_{0}^{2\pi}\!\! \int_{0}^{\infty} e^{-r^2}r\,dr\,d\theta = \pi \] }[/math]
This page is for testing the wiki.
[math]\displaystyle{ \[ \int_{0}^{2\pi}\!\! \int_{0}^{\infty} e^{-r^2}r\,dr\,d\theta = \pi \] }[/math]