Does Superstition (Ex) and Favored Class Bonus Stack ?

[Nyama]

Hello- new player here!
Question on my half-orc Barbarian

Does Superstition (Ex) and Favored Class Bonus(Add +⅓ to the bonus from the superstition rage power) stack?

Also, on my Rage Power-Beast Totem, Lesser, does Power attack apply to my two Claw attacks?

Thank you !

[The Mad Comrade]

The favored class bonus explicitly improves (adds to) the character's Superstition bonus.

Power Attack applies to all of your melee attacks, claws or otherwise.

Have fun shredding your enemies!