what did really happened on the final papers?

No joy or cheer faces coming out from the freezing hall of exam as paper's over. Foundation2 engineering students were completely stunned by the papers.every plans,every strategies are incapable of helping them. Its like hitting your fist on a PanzerIV's armor skirting,your fist broken and not a single scratch exist on the armor.sucks big time.why the lecturers suddenly changing the paper's format?after 3 consecutive semesters it was the same format..easy equations and direct questions.but now..everything had changed.the complex ever equations and 20 turn-a-round skull-crushing questions is kindly provided to us and we just flat in the ice-cold hall.May God help us..