$\frac{d}{dx}12x^2+8$

$\int\frac{x}{\left(\sqrt[2]{x}-1\right)}dx$

$\left(-8\right).\left(+4\right):\left(-2\right)$

$\lim_{x\to0}\left(\frac{e^x+cos\left(x\right)}{2cos\left(x\right)-x\cdot sin\left(x\right)}\right)$

$2\sqrt{36}$

$\lim_{x\to\infty}\sin\left(\pi\cdot x\right)$

$\frac{1}{2x}+\frac{1}{2x-1}=\frac{4x-1}{2x\left(2x-1\right)}$