$\lim_{x\to2}\left(3x^2-5x-2\right)$
$4a\cdot2a^2^2$
$\frac{dy}{dx}=\frac{5\cdot\:sin\left(y\right)}{x\cdot tan\:y}$
$\sec^4\left(a\right)-\tan^4\left(a\right)=\sec^2\left(a\right)+\tan^2\left(a\right)$
$\left(2xy\right)\left(-4x^2\right)+\left(6x\right)\left(6x^2y\right)$
$\left(5a^2+3a\right)^2$
$3x^2\le-343$
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