$\lim_{x\to0}\left(\frac{x+2}{x-1}\right)$

$\left(4y^2-16y\right)+\left(z^2-4z\right)-\left(x+20\right)$

$\frac{dy}{dx}+\left(3x^2-2x\right)y=e^{\left(-x^3+x^2\right)}\cdot sin\left(x\right)$

$da^2=-g$

$\left(m^3+2n\right)^3$

$-2x^2+5x-x^5-10x^5+4x^4-5x^3-8$

$cos2x+\sqrt{3}\sin x=1$