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![](//upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Flag_of_Mexico.svg/45px-Flag_of_Mexico.svg.png) | This user is a Mexican living abroad. | ![](//upload.wikimedia.org/wikipedia/commons/thumb/0/07/British_Passport.svg/32px-British_Passport.svg.png) |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/1/14/North_American_Aerospace_Defense_Command_logo.jpg/50px-North_American_Aerospace_Defense_Command_logo.jpg) | This user lives or has lived near NORAD. |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Logo-ubuntu_cof-white_orange-hex.svg/70px-Logo-ubuntu_cof-white_orange-hex.svg.png) | This user contributes using the free, open source operating system Ubuntu and enjoys its freedom and lack of viruses. |
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![{\displaystyle \nabla \times \mathbf {E} =-{\frac {\partial \mathbf {B} }{\partial t}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/2eb118e22c941e34f5537dbbdcaa3d7ba23603e0) | This user understands Physics at a graduate level. |
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![{\displaystyle \scriptstyle {\frac {\partial ^{2}\Psi }{\partial t^{2}}}=\nabla ^{2}\Psi }](https://wikimedia.org/api/rest_v1/media/math/render/svg/ce4363185ca9a1766c102c55eb4b1a9f0a496641) | This user is interested in mathematical physics. |
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This user knows that math is . |
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10 | This user realizes that there are 10 types of people in this world: those who understand binary and those who do not. |
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τ | This user believes tau should replace pi as a mathematical constant. |
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