$-\left(-6+8-8-9\right)+\left(-5+8-7+3\right)-8+3$

$\lim_{x\to1}\left(\frac{2x^2+x-3}{x+1}\right)$

$-30h-3$

$\int_5^{\infty}\left(\frac{1}{\sqrt{\left(x+1\right)}}\right)dx$

$\lim_{x\to0}\left(\frac{e^{\tan\left(x\right)}x-e^x}{\tan\left(x\right)-x}\right)$

$\sqrt{89x^2}$

$x^2+20x=8$