All I did, I multiplied this numerator and this denominator by x to the fourth plus 27, I didn't change it. And then we have that second term, minus 16x to the sixth over x to the fourth plus 27 squared. The whole reason why I did that, now I have a common denominator, now I can just add the numerators. So this is going to be equal to, this is going to be equal to, let's see, let's multiply, well, the denominator, we know what the denominator is. It is x to the fourth plus 27 squared, that's our denominator, and then we can multiply this out. This is 12x squared times x to the fourth, so that's 12x to the sixth plus 27 times 12, I don't even feel like multiplying 27 times 12, so I'll just write that out. So plus 27 times 12x squared, I just multiply the 12x squared times 27, and then minus 16x to the sixth.