I cant get step by step solution @ this diferantial equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg122520] I cant get step by step solution @ this diferantial equation*From*: mathmaniac <molla1991 at gmail.com>*Date*: Sun, 30 Oct 2011 04:26:15 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

y'=2(y+2)^2/(x+y-1)^2 Wolfram gives me the only right solution, i want to know how to Wolfram get that right solution ?