$\int\frac{5-x}{x^3}dx$
$-7-\left(-25\right)$
$\left(n^4-2n^2+1\right)\left(n^4+14n^2+49\right)$
$\frac{1}{x}>3$
$\lim_{x\to0}\left(\frac{e}{x^2}\right)$
$\left(x^2+2x+4\right)\left(-x^2-3x-2\right)$
$\frac{5x}{2}-3y=-17$
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