$\frac{d}{dx}x^3y+y^2-x^2=\frac{d}{dx}5$

$\left(-6\right)x\left(+22\right)$

$\frac{tanx}{secx-1}-\frac{tanx}{secx+1}$

$-6^4$

$8\:sin^2\left(\theta\:\right)cos^2\left(\theta\:\right)=1-cos\:\left(4\theta\:\right)$

$\lim_{x\to0}\left(\frac{3tan\left(3x\right)-x^3}{4ln\left(1-2x-3x^3\right)}\right)$

$3x^2-10x+3$