$\int\frac{\left(4x^3+2x-1\right)}{2x+1}dx$

$\left(x^3-3x^2+4x-4\right)\cdot\left(3x^2-3x+5\right)$

$\left(x+4\right)\frac{dy}{dx}=x+1$

$\lim_{x\to0}\left(\frac{x-sin\left(x\right)}{e^x-1}\right)$

$\lim_{x\to0}\left(\frac{1}{x^2}\right)^{tanx}$

$y'=4x^2y$

$-3x^2+24x-40$