Re: NAMAZ QUESTIONS specificaly
“subhankAllah…” is not a “farz” for a raka’at, hence reading or not reading of it doesn’t matter, as long as you joined the jama’at in standing position (before going to ruk’u you are fine (your 1st raka’at is complete).
Normally if you recite at’tahyaat, durood and istaghfaar dua you’ll end up finishing just in time, but if you are fast reciter you may say other duas.