$x^2-4>6$

$\int\frac{4}{x\left(x+4\right)}dx$

$\int x\left(ax+b\right)\cdot\ln\left(x\right)dx$

$\lim_{x\to\frac{\pi}{2}}\left(tan\left(x\right)\cdot ln\left(1+cos\left(x\right)\right)\right)$

$\lim_{x\to0}\left(x-\sin\left(x\right)\right)\cdot\left(\ln\left(2x\right)\right)$

$-5x^2+20x+60$

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