And if you are inspired, I encourage you to be, pause the video and try to work it out. Well, the way that we could do this is if we find the derivative at x equals one, the derivative is the slope of the tangent line. And so we'll know the slope of the tangent line, and we know that it contains that point, and then we can use that to find the equation of the tangent line. So let's actually just, let's just, so we want the equation of the tangent line when x is equal to one. So let's just first of all evaluate f of one. So f of one is equal to one to the third power, which is one, minus six times one squared, so it's just minus six, and then plus one, plus one, minus five. So this is equal to what?