A particle moves along the x-axis so that at any time t > 0, its acceleration is given by a(t) = $\displaystyle ln(1+2^t)$. If the velocity of the particle is 2 at time t = 1, then what is the velocity of the particle at time t = 2

I know what to do but i need help.

I know I have to take the integral of a(t) = $\displaystyle ln(1+2^t)$

But i dont know how to evaluate:

$\displaystyle \int ln(1+2^t) dt$

integral ln(1+2^x) - Wolfram|Alpha
wolf fram alpha found the integral but it doesnt do me any good because it comes out all funky