$2x^2y+2x^2z+2x^22v$
$8r-\left(-5.8s-8\right)$
$y'+xy=xy^{-2}$
$\lim_{x\to\infty}\left(\frac{5}{6}^n\right)$
$\left(2x-1\right)\left(x+3\right)$
$16sin\left(x\right)cos\left(x\right)=2cos\left(x\right)$
$-65+4+12$
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