$0=-0$
$\lim_{x\to0}\left(\frac{x^2+x+1}{e^x}\right)$
$\lim_{x\to4}\left(\frac{\sqrt{5}-2}{x^2-16}\right)$
$160^1-37$
$\lim_{x\to\infty}\left(xe^{-x}ln\:x\right)$
$\int\frac{5x^7-4x^2+x-1}{x+2}dx$
$\sin\left(nx\right)+\sin\left(nx+2x\right)+\sin\left(nx+4x\right)$
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