Partial diffrential equation

PDE is super hard. 3 days, i think 40% understood. how to go exam like this? No more time to waste. zero. i even feel guilty of sleeping these few days...

Ya Allah, Kau terangkanlah hatiku seperti mana engkau terangkan bumi ini dengan matahari dah seperti mana engkau terangkan hati nabi-nabimu...