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Test some LaTeX

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

H1 test

H2 test

$w_{\mathrm {eff} }=Ae^{-BR^{2}}$

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

$\int _{0}^{2}\sum 30\alpha \beta \gamma$

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

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

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test friedell

test date $y=y$ retest

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

• sand 2

$y=nx^{2}+mx+c$

$y=nx^{8}+mx^{4}+c$

$y=mx+c$

Notes

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