Method of Salaah

Q: If a person repeats an aayat of Surah Faatiha to correct a small tajweed mistake, will he have to make sajdah sahw if done forgetfully?

Q: After your fardh salaah with jamaat, is it better for the Imaam to make dua loudly or softly and what's the best duas to read?

Q: What are the best duas to read in qaumah and jalsah?

Q: After reciting Surah Ikhlaas in salaah, I mistakenly said sadaqallahul azeem. Is my salaah valid or is there sajdah sahw?

Q: Is it sunnat to say Allahu Akbar after the salaam of a fardh namaaz?

Q: Is it sunnat to make dua after fardh salaat and a hadith supporting it if it's true. Many of my friends tell me that's an Indian innovation and not a sunnat of Nabi (sallallahu alaihi wasallam). Please advise. 

Q: When you want to read a big surah in salaah, but not in full. Is it okay to read from anywhere in the surah and stop anywhere? And can you read one part of a surah in the first rakaat, the part after that in the second rakaat? Or do you have to read different surahs in each rakaat? 

Q: In sunnah and fard salaah, what duas can I read in sajdah?

Further, in nafil salah, can I make dua in English in sajdah?

Q: My question is that it is compulsory, mandatory to make dua (rabbiq firlee) in between the 2 sujoods because every time I offer salah I don't make the dua (rabbiq firlee) in between 2 sujoods.

What is the hanafi maslaq about this? They say it is better not make any dua in between 2 sujoods. Please explain this issue

Q: How does one know when to repeat salah if a mispronunciation occurs, e.g. does pronouncing ملحق at the end of dua e qunoot as ملهق, require one to repeat? I.e. Using smalll haa instead of big haa.