$8ab-2abd+4bc-10bd$

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

$\left(7^{14}\cdot3^{10}\right)$

$\lim_{x\to\infty}\left(\frac{x^2+2x+2}{5x^3+x^2}\right)$

$\frac{p^gq^4}{p^3q^{15}}$

$\left(\log\:_e\left(\frac{x}{52.69}+1\right)\cdot\:52.69\right)-x$

$\int\frac{x^3+x+5}{x^2+1}dx$