$4x^2-4x+40$
$\int\frac{-2t^5}{\sqrt{t^2+5}}dt$
$\int\frac{\left(x+21\right)}{x^2-18x+77}dx$
$\int\frac{9x-40}{x^2-9x+20}dx$
$\left(-x^{3}+x^{2}+12x+3\right):\left(x-4\right)$
$-3n^2+4n-59=-4n^2$
$\frac{x+1}{3}-\frac{2x+3}{4}$
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