First, a critical clarification is needed. The phrase "Sharh Hanafiyah" is a generic descriptor meaning "A Commentary on Hanafi Law." Several books fit this description. However, based on curriculum standards (specifically the Dars-e-Nizami syllabus of places like Darul Uloom Deoband, Nadwatul Ulama, and Quran Mahals), the term almost exclusively refers to or more precisely, "Al-Sharh al-Mu'tamad 'ala al-Wiqayah" —colloquially shortened in Urdu and Arabic madrasas to Sharh Hanafiyah .
Correction: No. Read page 89 carefully. The Hanafis differentiate between al-fawr (immediacy of the demand) and al-fawr al-hukmi (legal immediacy). You must intend to obey immediately, even if you perform the act later. sharh hanafiyah page 89
Focusing on the pillars, obligations, and the spiritual, as well as physical, requirements of prayer. First, a critical clarification is needed
"If the worshipper doubts [whether he has performed] three or four rak'ahs, he must base his action upon certainty (al-yaqeen) – which is the lesser number (three). He then completes the prayer based on that certainty, performs the fourth rak'ah, and then performs the prostration of forgetfulness (sajdatay al-sahw) before the Salam (Tahiyyah). Correction: No