$\int\left(x\cdot\left(x^2+5\right)^4\right)dx$

$\left(s-2\right)^4$

$\left(\frac{2}{3}\cdot a^{-3}+1\right)\left(\frac{2}{3}\cdot a^{-3}-4\right)$

$\lim_{x\to2}\left(\frac{x^2-4x+4}{x-2}\right)$

$\left(5x+2\right)\left(x+1\right)$

$\lim_{x\to0}\left(\frac{4^x-e^x}{\pi^x-cos\left(4x\right)}\right)$

$\frac{x^2-5x+33}{x+5}$