1. The problem statement, all variables and given/known data Evaluate ∫(x^3 + y^3)ds where C : r(t)=<e^t , e^(-t)>, 0 <= t <= ln2 c 2. Relevant equations 3. The attempt at a solution I tried to parametrize the integral and change ds to sqrt(e^(2t) + e^(-2t)) dt. I then change (x^3 + y^3) to (e^(3t) + e^(-3t) so i ended up with ln2 ∫(e^(3t) + e^(-3t)) * sqrt(e^(2t) + e^(-2t))dt 0 I feel like i set the integral up wrong becuase I would have no idea of how to do this integral. Even wolframalpha gives me a crazy answer. Is there another way to do this or did i make a mistake?