Will these all stack?

[zados]

http://gyazo.com/43652de562cae786c1f1a37e9adc001b

I was wondering if you could take all those lines of dex bonus?

[HGM-Chi]

Generally speaking you can take class and racial bonuses to a stat, but only one of each. So you can take half-elf dex and ranger dex, but not rogue dex, or half-elf dex and rogue dex, but not ranger dex.