$\frac{5x^2}{2}-3$
$\left(\frac{x}{x+1}+\frac{x}{x-1}-1\right)\left(x^2-1\right)$
$15x^2-x-1$
$\frac{d}{dx}sec\sqrt{xy}=3x^2-4y^2$
$\cot^2x+\csc^2x=3$
$-10.62-17.5$
$-101-80+44$
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