$\left(-1-\left(\frac{3}{b}\right)+\frac{181}{249}\right)$
$\cot\left(x\right)\sin\left(x\right)+\tan\left(x\right)\cos\left(u\right)$
$\lim_{x\to-\infty}\left(\frac{2x+7}{2x+1}\right)$
$-\left(-2a+10\right)^2$
$\int\left(\frac{1}{z}\right)dz$
$m^2+16m-17$
$2x^2+5x=4$
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