$x\left(x+1\right)<\:2$

$\frac{dy}{dx}=\frac{11xy}{ln\left(y\right)^2}$

$\lim_{x\to0}\left(\frac{\sin\left(x\right)}{x^4}\right)$

$-3x^2\cdot4$

$\left(3-4x\right)\left(8x^3-7x^2+x\right)$

$\frac{d}{dx}\left(\frac{\log\left(x\right)}{10+\log\left(x\right)}\right)$

$\sin\left(x-\pi\right)+\cos\left(2x\right)=0$