So that's just going to be plus one. It's going to be equal to 1 1⁴. And so this whole expression over here, so I can write the second derivative of y with respect to x is going to be equal to, well, we know that that's going to be equal to 1 1⁴. 1 1⁴ times three times one squared, which is just three, minus negative one, so plus one, minus one, so I'll just leave that minus out there, times six times one, times 1⁴. Let me just write it out. Six, six times one, times 1⁴, minus one. All of that over, let's see, this is going to be three times y squared.