Can I combine a strike with combat expertise and/or power attack?
Strike: A strike is a maneuver that allows a special attack. A martial disciple who slays a wyvern in a single blow is using a strike. A strike imparts some bonus or advantage over a standard attack, such as extra damage, or an additional effect such as blinding a foe.
Strikes almost always require a standard or full- round action. Most involve a melee or ranged attack as part of completing the maneuver. If the attack hits, your opponent takes normal melee or ranged damage, as well as suffering the effect of the strike. When making a strike, you use your base attack bonus, all attack and damage modifiers, weapon damage, and so forth, as normal. You can make a critical hit with a strike, but you do not multiply extra damage from a strike when calculating the critical hit damage. It is treated just as extra damage from another special ability would be (like deadly strike damage or damage from a flaming weapon).
Because strikes require a specific form of attack, you cannot benefit from spells or effects that grant extra attacks when making a strike (such as the haste spell or a speed weapon). You are not taking a full attack action when you initiate a strike whose initiation action is 1 full round, unless otherwise specified in the description. Also, you cannot combine special attacks such as disarm or sunder with strikes, unless stated otherwise in the maneuver's description.