Well let's just sample a number there. Let's say the number, I don't know, 1 1 2 might be really straightforward. So we can evaluate g prime of 1 1 2. G prime of 1 1 2 is equal to four times 1 1 2 to the third power. 1 1 2 to the third power is 1 8th. So it's 4 8ths, or it's just 1 1 2, minus five times 1 1 2 to the fourth. So that's 5 1 6ths.