$\left(8ab-4\right)\left(8ab+5\right)$
$\int\frac{\left(x+1\right)}{x^2+x-2}dx$
$x^2+22x+66$
$3x^2-2x+3$
$\lim_{x\to\frac{\pi}{4}}\left(\frac{\cos\left(x\right)^2}{1-\sin\left(2x\right)}\right)$
$25\:.\:\left(2-9\right)\:.\:4$
$k^3-5k^2-k+5$
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