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Test some LaTeX

$\sum \int \eta \frac{\pi }{2}$

$\sum \int \eta \frac{\pi }{ϵ\sigma }$

$\underset{0}{\overset{2}{\int }}\sum 30\alpha \beta \gamma$

$\stackrel{5150}{\overbrace{1+2+\cdots +200}}$

$N=1+fP\frac{(f-1{)}^{G+1}-1}{f-2}$

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test friedell

test date $y=y$ retest

$\iint y^{2}dy$ $\iint y^{2}rrrrdy$

• sand 2

$y=n{x}^2+mx+c$

$y=n{x}^8+m{x}^4+c$

$y=mx+c$

Notes

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