$\lim_{x\to\infty}\left(\frac{x}{x+5}\right)^x$
$3-2a+3a+5a$
$4a^3\cdot2a^{-3}$
$9-4x>6-3x$
$\frac{dy}{dx}=\frac{xy^2}{x^2+1}\:;y\left(0\right)=-9$
$\int\left(\frac{1}{sec\left(5x+1\right)}\right)dx$
$2x^4-\frac{-2x^3}{3}+\frac{-8x}{3}+4$
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