Are there powerful and answered supplication formulas? Please advise.

The Prophetic supplications from the Qur'an and Sunnah are powerful, answered, and blessed. Among them are:

1. The supplication of Dhul-Nun: "There is no deity except You; exalted are You. Indeed, I have been of the wrongdoers." No Muslim ever supplicated with it for anything but that it was answered. 2. The supplication of Fatimah: "O Ever-Living, O Self-Sustaining, by Your mercy I seek aid. Rectify for me all of my affairs and do not entrust me to my soul for the blink of an eye." 3. The supplication of Ibn Abbas: "O Allah, aid me and do not aid against me, grant me victory and do not grant victory over me, plan for me and do not plan against me, guide me and make guidance easy for me, and grant me victory over those who oppress me. My Lord, make me greatly thankful to You, greatly remembering You, greatly fearing You, greatly obedient to You, greatly humble to You, and greatly returning and repentant to You. My Lord, accept my repentance, wash away my sins, answer my supplication, make firm my proof, guide my heart, make straight my tongue, and remove the malice from my chest." 4. When overwhelmed by a matter: Saying "Sufficient for us is Allah, and [He is] the best Disposer of affairs." 5. The supplication for leaving the home: "O Allah, I seek refuge in You from going astray or being led astray, from slipping or being made to slip, from oppressing or being oppressed, and from acting foolishly or being acted foolishly upon." 6. For facilitating matters: "O Allah, there is no ease except in what You have made easy, and You make hardship easy if You will."