$xy^2\frac{dy}{dx}=x+5$
$62\cdot196$
$16y^2-4u$
$x^2+1<2x$
$\lim_{x\to0}\left(cos\left(x\right)^{cos\left(x\right)}\right)$
$sec^2\left(-x\right)-1=tan^2$
$\left(4x-3\right)\ge x$
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