$\lim x\to\:2\:\frac{cos\left(\frac{1}{x-2}\right)}{\frac{1}{\left(x^2-4\right)}}$
$\frac{8^6}{8^5}$
$\left(x-5\right)^2=121$
$\int^2\left(x^4+2x^2-5\right)dx$
$5^4\:x\:7^4$
$\frac{dy}{dx}=\frac{5x^2}{4y}\:$
$4x^2-24y$
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