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

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