In case this is confusing, here’s some more explanation.
No, Yeah = Yeah (the no dismisses uncertainty about the yeah)
Yeah, no = No (the yeah confirms the no)
Yeah- no, for sure = yeah (yeah is the answer, with “no, for sure” as emphasis under the same rule as “no, yeah” where the no dismisses uncertainty about the for sure. Generally this means the speaker actually agrees with the asker)
Yeah, yeah, yeah = no (because either the speaker is not listening/paying attention, does not believe the asker, or they are dismissing the asker, often because they have something else to say/suggest; additionally this one is usually used with familiarity, not strangers, and often accompanies annoyance of some sort)
Yeah- no, yeah = Yeah (same terms as “yeah- no, for sure” but less enthusiastic or less in agreement with the asker, ie: willing to do it but may not want to do it where “it” may be anything from agreeing with the asker to doing a task)
No- yeah, no = No (no is the answer, with “yeah, no” as emphasis under the same rule as “yeah, no”)