How does Wolfram Alpha do it? https://www.wolframalpha.com/input?i=integrate+%28e%5E%28x%2F2%29+cos+x%29+%2F+%28%283+cos+x+%2B+4+sin+x%29%5E%281%2F3%29+dx http

How does Wolfram Alpha do it? https://www.wolframalpha.com/input?i=integrate+%28e%5E%28x%2F2%29+cos+x%29+%2F+%28%283+cos+x+%2B+4+sin+x%29%5E%281%2F3%29+dx https://www.wolframalpha.com/input?i=integrate+%28e%5E%28x%2...