$\frac{dy}{dx}+y\tan\left(x\right)=\cos^2\left(x\right)$

$\frac{d}{dx}y^3-xy^2=-x^2+4$

$81-4f^2$

$\cos2y-\sin2y\cdot\csc\left(y\right)=2\cos^2\left(\frac{y}{2}\right)$

$\frac{200\left(3\right)-600\left(3\right)}{3^2-9}$

$\lim_{t\to2}\left(\frac{t^2-4}{2t-4}\right)$

$\int7\:\sin\left(\frac{x}{2}\right)cos\:\left(4x+3\right)dx$