$k^3-5k^2-k+5$
$\int\left(x^2-4\right)^{13}2xdx$
$\int\left(1+15x^2\right)^{-1}dx$
$\sqrt[2]{2a^5}$
$-x^3-10x^2-28x-24$
$9x^2+24x+40$
$\lim_{x\to-2}\left(\frac{\sin\left(x\right)}{3x^2-x}\right)$
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