Hello, I use the WolframAlpha, to calculate the integral, but it seems cannot recognize the \element symbol. I attach the image and the web link. Could you give some help? Thank you!
https://www.wolframalpha.com/input/?i=integrate%5B+x%2Bn+%2C+%7Bx%2C0%2C1%7D%2C+assumptions-%3E+n%5C%5BElement%5D+Integers+%5D
https://www.wolframalpha.com/input/?i=integrate%5B+x%2Bn+%2C+%7Bx%2C0%2C1%7D%2C+assumptions-%3E+Element%5Bn%2C+Integers%5D+%5D