$-4k^2-k+-5k+3k^2+-3k^2$
$2x^2-11x-3$
$6\frac{1}{2}-4\frac{1}{2}$
$\left(x+3\right)^2-11\left(x-3\right)+30$
$\int\frac{1}{\left(x-1\right)\left(x-2\right)\left(x+3\right)}dx$
$-20+-10+-50+-30$
$7-52+3-64-8$
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