According to the Gemara (Brachos 11b), once one has made the blessing of Ahava Raba before saying Shema, than he no longer has to make birkas hatorah in order to learn Torah afterwords. The Shulchan ...
Must one say Birchas Hatorah before learning Aggadata in the Gemara? Biographies like Shem Hagedolim (a biography of various Rabbonim written by the Chida)? Artscroll biographies?
If one makes a mistake in saying a Bracha (like he started saying a bracha and remembered that he shouldn't say it) after saying "Baruch Atah Hashem", he should finish it off with "lamdeini chukecha" ...