please answer me .. is this strong formation?

Yes, it's good, but I would prefer Trezeguet over Amauri.

Nedved has traditionally played off the left flank. Interesting to see him more central here. I guess he could be seen more in a playmaker role now he's knocking on a bit. Camoranesi is always quality. I'd probably go with Poulsen rather than Sissoko. But I think I agree with 88 in going with Amauri or Iaquinta ahead of Trezeguet tho.
:-D
Not sure if the spelling is deliberate, m8, but I'm guessing you mean Manninger, Grygera and Legrottaglie?