$\frac{x^2-8x+3}{x-5}$

$\int\frac{5}{\left(3x-5\right)^3}dx$

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

$-5-7-6+5$

$\int6sin^{-1}xdx$

$\lim_{x\to0}\left(\frac{\sqrt{1+xsenx}-\sqrt{cos^2x}}{tan^2\left(\frac{x}{2}\right)}\right)$

$2\cos\left(x\right)+\left(\frac{7}{\cos\left(x\right)}\right)=0$