Alright, that's going to be equal to, on the right hand side, derivative of y with respect to x is just dy dx. Now if I want to, I could solve for the second derivative of y with respect to x, but what could be even better than that is if I substitute everything else with numbers, because then it's just going to be a nice, easy numerical equation to solve. So we know that we want to figure out our second derivative when y is equal to one. So y is equal to one, so that's going to be equal to one. And this is going to be equal to one. X is equal to negative one. So let me underline that.