$2\sin\left(2v\right)-\sin\left(v\right)=0$
$x^2\:\ge6\:-\:x$
$\frac{dy}{dt}=-y^2\:;\:y\left(0\right)=\frac{1}{2}$
$\frac{dy}{dx}=2x\:for\:y\left(0\right)=-5$
$12x^9-15x^7+21x^5$
$\tan^4x\sec^3x$
$\left(x^2+4x-2\right)^2$
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