$\lim_{x\to0}\left(\frac{e^{4x-1}}{sin\left(x\right)}\right)$
$4b\left(4b\:+\:1\right)\:=\:0$
$-2x^2+3x+3$
$\:\int\left(x^2+2x-1\right)\:e^3x\:dx$
$\lim_{n\to0}\left(\frac{\left(n+1\right)^{n+1}x}{n^n}\right)$
$\frac{125-343z^{15}}{5-7z^5}$
$9\:+\:13\:-\:\:-9\:-\:15\:+\:2$
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