Simplifying
$-2m-7\left(7m+4\right)$
$\frac{x^3+5}{x^2-1}$
$\cos^2\left(x\right)^2$
$\ln^2\left(x\right)$
$x-5<0$
$\frac{dy}{dx}\left(3x^{-4}-5x^{-1}=y\right)$
$\lim_{x\to0}\left(\frac{ay}{2x^{\frac{1}{2}}}\right)$
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