5 isn't a valid function name, is obviously the right answer.

Let's keep it easy. There's 2 + all the other number who results in 15 = 17.

Someone may mistake by doing 2+5 then the rest of the operation, resulting in 21. But is wrong.

Hrmm.

I read that as resulting in 21.

My education system did fail me.

I plugged that into ghci as 2+5*(8-5), and it says 17.

:(

I did (2+5)*(8-5).

Doh.

[Edit: (Double doh! Mistyped that here as 5+2. XD)]

I'm not seeing a single mention of My Dear Aunt Sally. The youth are lost...

This is an antimeme

PEMDAS bitches.

The high-and-mightiness quotient in this thread is reaching critical levels