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

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

$\left(-18\right)-\left(-31\right)-\left(-3\right)-\left(-16\right)$

$\frac{d^3y}{dx^3}\left(ax+b\right)^4$

$\lim_{x\to\infty}\left(1+\frac{3}{x}\right)^{8x}$

$\frac{d}{dx}\left(6y+2\right)$

$\left(-3\right)+\left(+2\right)-\left(-4\right)+\left(-1\right)$