$3a+2\le8$
$16cosx-3=\sqrt{128}-3$
$\sqrt{x}+\sqrt{y}=9$
$\int\frac{2}{x\sqrt{x^2+25}}dx$
$3^0+3^{-2}$
$\frac{dy}{dx}-4e^{2x}=0$
$2x^3-4x^2+18x$
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