WolframAlpha cannot recognize \element symbol?

[zzy2417 (Nono Z)]

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!

integrate[ x+n , {x,0,1}, assumptions-> n\[Element] Integers ] - Wolfram|Alpha

integrate[ x+n , {x,0,1}, assumptions-> Element[n, Integers] ] - Wolfram|Alpha