$\int\frac{x+2}{\left(x^2+4x+13\right)^2}dx$
$-44+7a^2-35$
$\int\left(10x+x^4\right)dx$
$\left(3x^5+7x^2-2\right)+\left(x^3-4x^2+1\right)$
$\int\frac{x^2+1}{x-4}dx$
$4x^2-36x+81$
$5xp+5py-3ax-3ay$
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