The integral above is definite so we must first calculate for indefinite one.
Now we apply this rule and get:
Or just simply:
Now we integrate:
in if you ask questions, the points are taken from your total and given to the one who answered it..
so if i have 30 points and i ask a question for 5 points, then when someone asks a question i will lose 5 points and the answerer earns 5