$4k^3w\:+\:20k^2w^2\:+\:25kw^3$
$2x-4y+5z=0$
$\lim_{n\to\infty}\left(ln\left(n+1\right)\:-\:ln\left(n\right)\right)$
$\int\frac{x\cdot e^x}{x^3}\:dx$
$\frac{x^{-1}}{x^{-5}yz}$
$y^2-10y+49$
$\frac{x-4}{4}+\frac{x}{3}=6$
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