$\int\frac{\sqrt{x^2-2}}{x^4}dx$
$\frac{dx}{dt}=4-\frac{x}{500+2t}$
$cos2\theta\:+10cos^2\theta\:-8=0$
$\frac{x+1}{2}+\frac{x-1}{3}\ge6$
$-90-125$
$\frac{dx}{dy}=\frac{4\left(1-x\right)}{40}$
$\frac{6^{16}}{6^8}$
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