And then we could write this as, and I'm trying to just do every step here. A lot of these you might have been able to do in your head. One over, and I'll just write this as x minus three over two squared plus one. Plus one, and then dx. And now the u substitution is pretty clear. I am just going to make the substitution that u is equal to x minus three over two. Or we could even say that's u is equal to 1 1 2 x minus 3 1 2, that's just x minus three over two.