91Ó°ÊÓ

Integrate the functions. $$ \frac{1}{\sqrt{(2-x)^{2}+1}} $$

Integrate the functions. $$ \sqrt{x^{2}+4 x-5} $$

Find the integrals of the functions. $$ \frac{\cos x}{1+\cos x} $$

Find the following integrals. $$ \int(1-x) \sqrt{x} d x $$

Integrate the functions. $$ \frac{x e^{x}}{(1+x)^{2}} $$

Evaluate the definite integrals. $$ \int_{0}^{\pi}\left(\sin ^{2} \frac{x}{2}-\cos ^{2} \frac{x}{2}\right) d x $$