$\lim_{x\to-1}\:\frac{x^3+1}{x^2+1}$
$\left(4x^3+x^2\right)^2$
$\lim_{x\to4}\left(\frac{\sqrt{8x-16}-4}{x-4}\right)$
$\left(2u^3\right)^3\cdot u^2$
$\frac{\sqrt{3}}{4}\left(3.5\right)^2$
$54-c+3c^2-10$
$35m^5-49m^3-7m$
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