Dua #1.
رَبَّنَا إِنَّنَا نَخَافُ أَن يَفْرُطَ عَلَيْنَا أَوْ أَن يَطْغَى
طه :45
Rabbana innana nakhafu any-yafruta 'alayna aw any-yatgha
Our Lord! We fear lest he hasten with insolence against us, or lest he transgress all bounds - 20: 45
This was the dua that Musa (A) and Harun (A) made to Allah I before going to Firoun.
Dua #2.
رَبِّ اشرَح لى صَدرى ﴿﴾ وَيَسِّر لى أَمرى ﴿﴾ وَاحلُل عُقدَةً مِن لِسانى ﴿﴾ يَفقَهوا قَولى
Rabbish rahli sadri wa yassir lee amri wahlul ukdatan min li saani yafkahu qawli
O, my Lord! open my chest for me and make my task easy for me and make loose the knot from my tongue so that they understand my speech
Surah Ta-Ha ,verse 25-28
Dua #3.
رَبِّ زِدنى عِلمًا
Rabbi zidna ilma
O, my Lord! increase me in knowledge
Surah Ta-Ha ,verse 114