$\lim_{x\to3}\left(\frac{cos\left(\pi x\right)+2^{\left(x-3\right)}}{x^3-27}\right)$
$\frac{x^3-28x-48}{x+4}$
$343b^2-7b^4$
$8\pi\left(x-8\right)\left(x^2-64\right)$
$4x^2y-2xy^2-8y$
$\frac{5}{\sqrt{2}}0$
$11-\left(-16\right)$
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