$\lim_{x\to0}\left(\frac{log\left(1+x\right)-x}{1-\cos\left(x\right)}\right)$

$\lim_{x\to\frac{\pi}{2}}\left(8\cdot cos\:\left(7x\right)\cdot\:sec\:\left(7x\right)\right)$

$\left(3p^2-5\right)^3$

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

$\lim_{x\to-1}\left(\frac{x^2+3x+2}{sin\left(x+1\right)}\right)$

$72+15$

$\frac{d}{dx}\:-\:3\cdot x^2\:=\:0$