$x^3+5x^2-17x-21$
$\left(x+y\right)^{2}+\ln x-1=0$
$9x^2-30x+25=0$
$p-89=46$
$\lim_{x\to3}\left(\frac{-4.9t^2+44.1}{t-3}\right)$
$80+57$
$-\:14\:-\:\left[17\right]\:-\:\left[-3\right]$
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