# Wikipedia:Sandbox

##### Article

October 17, 2021 ## Did you know...

...you can upload images and other media files to Wikimedia Commons to make them available on all Wikimedia projects? This is handy, because images now only have to be uploaded once and therefore only take up 1x disk space.Learn more about this — New tip

## Wikisyntax

internal link external link on sum min genge num merd by means of num more and underlined crossed out big pre-text code typewriter small text series of letters and punctuation marks definition explanationDo not indent 1 indent indent 2 times Indent 3 times, with enumeration4 indents, with enumeration

## Examples

OZH Euler's line: OH 9 R 2 - ( a 2 + b 2 + c 2 ) 2 {\displaystyle {\sqrt[{2}]{9R^{2}-(a^{2}+b^{2}+c^{2})}}} NZI Nagel's line: NI 6 r 2 - 12 R r + a 2 + b 2 + c 2 2 2 {\displaystyle {\sqrt[{2}]{6r^{2}-12Rr+{\frac {a^{2}+b^{2}+c^{2}}{2}}}}} EZL line of Lissajou: EL 9 R 2 + 12 r 2 - 6 R r - ( a 2 + b 2 + c 2 ) 2 {\displaystyle {\sqrt[{2}]{9R^{2}+12r^{2}-6Rr-(a^{2}+b^{2}+c^{2})}}} f ⋅ Δ s W {\displaystyle F\cdot \Delta {s}W} i ℏ ∂ ∂ t ψ ( r , t ) huh ψ ( r , t ) {\displaystyle i\hbar {\partial \over \partial t}\psi (r,t)H\psi (r,t)}

## Back to the crash course

After practicing in d

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