$16-1-3$
$-8-\left(+6\right)-\left(-4\right)$
$17mn\:\left(m^2n^2-3mn+5\right)$
$14-3x=4x$
$-9\left(7v+-5\right)+4v$
$\left(x+a\right)^2+5\left(x+a\right)+4$
$\lim_{x\to\frac{-1}{2}}\left(\frac{x^2-3x+1}{2x+1}\right)$
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