$\frac{x^2-4x+4}{x^2+7}$

$\int\frac{\left(x\right)^2}{\sqrt{x^2-25}}dx$

$4x^2-40x+400$

$\int_0^{\frac{1}{\sqrt{3}}}\left(6\sqrt{x^2+1}\right)dx$

$\frac{d}{dx}\left(17x-cosx\right)^{\frac{1}{x}}$

$\frac{4}{5}+\frac{6}{5}$

$\frac{\left(u-1\right)\left(1\right)-\left(u+1\right)\left(1\right)}{\left(u-1\right)^2}$