$\lim_{x\to-3}\left(\frac{4x^2-2x-9}{x^3+27}\right)$
$9x^2-121$
$4b+6-4$
$-112\cdot4$
$\frac{dy}{dr}=y\sin\left(r\right)\:;\:y\left(\pi\right)=-3$
$\frac{\left(y^2\right)}{y^4}^2$
$\left(-6\right)\left(-1\right)\left(8\right)$
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