How can I combine multiple Advanced Smart List filters?

If you have an Advanced Smart List filter to exclude tasks in Inbox:

#Inbox !

and an Advanced Smart List filter to show tasks with labels @quick OR @easy :

@quick @easy ||

You can combine them with AND like this:

@quick @easy || #Inbox ! &&Meaning: all tasks not in Inbox labeled @quick or @easy

You can combine them with OR like this:

@quick @easy || #Inbox ! ||Meaning: all tasks not in Inbox as well as tasks labeled @quick or @easy

To read more about all the advanced Smart List filter options go here:
​Advanced Smart List filters