# Recitation 22

Exercise:

1. $\int\frac{dx}{x^2+4x+13}$
2. $\int\frac{\cos(x)}{\sin^2(x)+2\sin(x)+2}dx$
3. $\int\frac{dx}{\sqrt{4-x^2}}$
4. $\int\frac{dx}{x\ln(x)\sqrt{\ln^2(x)-4}}$
5. $\int\frac{e^x}{\sqrt{9-e^{2x}}}dx$
6. $\int\frac{e^x}{e^{2x}+2e^x+2}dx$