$\frac{dy}{dx}\left(x^2+y^2=y^4-2x\right)$
$-4-4\cdot8$
$x^2+\:12x-3$
$\log\left(x\right)-\log\left(4\right)=3$
$\lim_{x\to0}\left(\frac{x^2}{cosx-1}\right)$
$\left(\sec\left(x\right)-\csc\left(x\right)\right)\sin\left(x\right)\cos\left(x\right)$
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