is it possible to merge multiple incrementals as single one?

Say there are base, inc1, inc2, inc3… Can I create another new incremental = inc1 + inc2 + inc3?

I too have same query. If I have Base, Inc1,inc2 and Inc3, is it possible to create Delta = Inc1 + Inc2 + Inc3. This way I can have Base and Delta available for restore back.