$\lim_{x\to-2}\left(\frac{x^2+7x-10}{x+2}\right)$
$9+4\left(2x+-3\right)+3\left(1x+4\right)+-3$
$65.87-8.696$
$5d^3+80d-40d^2$
$tanx\left(tanx-2sinx\right)=0$
$-21:\:-5$
$-55-\left(-69\right)$
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