I have absolutely no idea how I'm supposed to do this.

Evaluate each of the following definite integrals:

a) $\displaystyle \int_1^4 \frac{x^2+2x}{\sqrt{x^2}} dx$

b) $\displaystyle \int_{-1}^{1} \frac{1}{v}(3v^3-v^\frac{-1}{3}) dv$

Can anyone point me in the right direction? I've done definite integrals, but none that hard before.

Thanks in advance :)