Answer:
(Fatwa: 378/H=108/th=1432)
Your salah was valid, i.e. now you are not asked to re-offer those salah. However, it is wajib to memorise and read the whole tashahhud correctly.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
