User:Luístro/sandbox

• My sandbox is empty,except for this
• This folder is empty, but so it will not exist, because it has a hidden file with the folder name and file number

$\underbrace {\lVert prod\textstyle \sum _{k=1}^{N}\displaystyle \lfloor \infty \rceil {\begin{cases}3x+5y+z\\7x-2y+4z\\-6x+3y+2z\end{cases}}\rVert \nabla \psi \operatorname {d} \!y/\operatorname {d} \!x{\partial ^{2} \over \partial x_{1}\partial x_{2}}y\propto {\begin{alignedat}{2}f(x)&=(a+b)^{2}\\&=a^{2}+2ab+b^{2}\\\end{alignedat}}} _{{{}_{p}F_{q}\left({a_{1},\ldots ,a_{p} \atop b_{1},\ldots ,b_{q}};z\right)\ggg \infty +1\nleqslant \textstyle \sum _{k=1}^{N}\displaystyle \theta \over \partial x_{1}\partial x_{2}}\Longrightarrow {\begin{array}{|c|c|c|}a&b&S\\\hline 0&0&1\\0&1&1\\1&0&1\\1&1&0\\\end{array}}}$

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