So I could write it as 3 times y minus x squared plus, sorry, minus 2x. So we're adding this to both sides, and we're subtracting this from both sides, minus 2x. And then to solve for dy dx, we've done this multiple times already, to solve for the derivative of y with respect to x. The derivative of y with respect to x is going to be equal to 3 times y minus x squared minus 2x, all of that over this stuff, 3 times y minus x squared. And we can leave it just like that for now. So what is the derivative of y with respect to x? What is the slope of the tangent line when x is 1 and y is equal to 4?