Frenzied Berserker and Slashing Flurry

[tigrillo-10]

Slashing Flurry Feat: When you use a standard action to attack with any slashing weapon, you can choose to make a second attack with that weapon. You take a -5 penalty on the first attack, and a -10 penalty on the second. When you use a full attack action with any slashing weapon, you gain one additional attack at your highest base attack bonus. That attack and all other attacks you make in the current round take a -5 penalty.

The attack extra of this feat stacks with extra attack of Frenzied Berserker?

Thanks :D

[Feilith]

Frenzy (Ex): A frenzied berserker can enter a frenzy during combat. While frenzied, she gains a +6 bonus to Strength and, if she makes a full attack action, gains a single extra attack each round at her highest bonus. (This latter effect is not cumulative with haste or other effects that grant additional attacks.) However, she also takes a —4 penalty to Armor Class and takes 2 points of nonlethal damage per round. A frenzy lasts for a number of rounds equal to 3 + the frenzied berserker's Constitution modifier. To end the frenzy before its duration expires, the character may attempt a DC 20 Will save once per round as a free action. Success ends the frenzy immediately; failure means it continues. The effects of frenzy stack with those from any rage ability the character may have.

Sadly No, Dam You Frenzied Berserker and your not stacking