$\lim_{x\to0}\left(\frac{x^2+2x-3}{x-1}\right)$

$\lim_{x\to8}\left(\frac{\sqrt{2x}-\sqrt{6x-32}}{x^2-8x}\right)$

$-25x^2y-10x^2y+15x$

$8.3p^2+4.8p$

$-51-\left(-23\right)+\left(-16\right)$

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

$\frac{x+7}{x^2-x-6}$