$\int_0^1\left(\frac{2\left(5x^3-4x\right)}{x^4-16}\right)dx$
$-4x^2-6x+14$
$\lim_{x\to0}\left(\frac{\tan\left(3x\right)}{x}\right)$
$\int\left(\frac{9x+4}{\left(9x^2+8x\right)^5}\right)dx$
$\lim_{x\to0}\left(\frac{\cos\left(x\right)-1+\frac{1}{2}x^2}{8x^4}\right)$
$x-y-z=11$
$\frac{2}{5x}-2\le-\:0$
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