$4x^4+10x^2+4$
$\int\frac{x^2-1}{\left(x-2\right)\left(x+1\right)}dx$
$-\left(2-5\right)+\left(-3\right)\cdot\left(-11\right)$
$x^2+8x+15+\left(x^2+7x+12\right)-2x^2$
$-6529-2826$
$y'=2x^2+2y$
$9x^2+79x+56$
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