The derivative of y with respect to x. Let me scroll down a little bit so we have a little bit more space. The derivative of y with respect to x is going to be equal to one over three times one squared, which is just three, minus negative one. 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.