$\lim_{x\to4}\:\sqrt{\frac{x^2-2x+3\:}{3x+4}}$
$\frac{-18}{x+4}=\frac{-10}{x}$
$2x\sqrt[2]{4^4}x\sqrt[2]{2^{-2}}$
$\sqrt[3]{200}x\sqrt[3]{40}$
$\left(2+\sqrt{y}\right)\left(2-\sqrt{y}\right)mn8$
$\frac{e^{-88}}{e^{88}}$
$300-300e^{-\infty}$
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