1. The problem statement, all variables and given/known data Just trying to figure out the anti-derivative of cosh(x^2). 2. Relevant equations I knowthe antiderivative cannot be expressed as an elementary function but I am pretty clueless of getting the antiderivative though! 3. The attempt at a solution I am baffled by this one :(. Any help and pointers would be much appreciated. thanks in advance!