$70+15+11-5$
$2\sin^3\left(2x\right)-3sin^{2\:}\left(2x\right)-2sin\left(2x\right)=0$
$\frac{dy}{dx}\left(\left(x+y\right)^2=2ax\right)$
$\frac{4x^3+8x^2-13x-23^2}{2x+5}$
$6-\left(-9+7-1\right)$
$x\frac{dy}{dx}=y^2-4$
$y^2-8y-16$
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