$\frac{3x^2+17x+20}{3x^2-x-10}$
$4x+22$
$\int\frac{5}{1+e^{-x}}dx$
$\frac{1}{x+y+8}-\frac{1}{x+8}$
$\int_{1-3x}^1\left(\frac{t^3}{1+t^2}\right)dt$
$-2\cdot22$
$2x^2-4x-1$
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