$\int\frac{\left(x+1\right)}{\left(x+7\right)\left(x^2+6x+9\right)}dx$
$1000+27a^3$
$581+-208$
$\int\:\left(e^xinx\right)dx$
$2x^2+4xy-6x+2xy+x-xy-y^2$
$\left(x-2y-8\right)\left(x-2y+4\right)$
$7\left(x+y\right)$
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