This action can be only used on definite integrals.


Please see the screenshots below to see how this action works. Note that to solve the the example below we are not required the to use "Split integral" action.  











Now the splitted integrals can be computed separately by using "Evaluate: Integral" action. 



Hope you have found this helpful. Please note that you can contact us here in case you have questions or concerns using this action.