$a^2-8a+12=0$
$3xyz\:-52xy$
$\sin\left(x-20\right)$
$x+3\le41$
$\left(6m+3\right)\left(m+n\right)$
$7\left(2+4-\left(-3\right)\right)$
$4\left(x+2\right)-3\left(x-5\right)mxg$
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