$\sec\left(60\right)^2+\cos\left(90\right)^2$
$cos\left(sin^{-1}\left(\frac{4}{5}\right)+cos^{-1}\left(\frac{3}{5}\right)\right)$
$x^2\cdot y'+y=0$
$2.5y+3.5=-1.25$
$\frac{d}{dx}\sqrt{1-x^2}$
$\frac{dy}{dx}=x^2+3+e^{2x}$
$86-33-64+87-97+10+99-99$
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