Hi Cetin,
It's very funny. But, I think that missing a little bit "synchrony". Another solution will be:

(a+b)^n = (a + b) ^ n = (a  +  b)  ^  n = (a   +   b)   ^   n etc.

Good week! 8-D


>Today I got a series of creative math solution by email. One of them was a copy of real exam paper.

>Question: Expand (a+b)^n
>Answer:
>(a+b)^n = (a + b)^n = (a  +  b)^n = (a   +   b)^n etc.

>Teacher's note was "Very funny Peter".
>Cetin