In old version of Onenote, after inking an integral expression, such as dx/(x^2 +1) we can evaluate it by MATH button (it show "Select an action - evaluate"), but it disappear in newest version! Why? Please bring it back.
This should be fixed now. If you are still having issues, please file a support ticket at https://edusupport.microsoft.com/support
Huỳnh Nghiêm commented
I'm Office 365 subscrited user.