$\frac{dy}{dx}=y\left(y-1\right)\frac{1}{\sin x}$

$9k^{-\frac{1}{4}}$

$-3b-3c$

$\frac{tan^2\left(x\right)}{1-cos^2\left(x\right)}=2$

$7\tan\:\left(x\right)\sin\:\left(x\right)=-6\sin\:\left(x\right)$

$\frac{d}{dx}\left(\left(sin\left(x\right)\right)^{cos\left(x\right)}\right)$

$\int\left(\frac{2x}{x-9}\right)dx$