Linear Differential Equation - Initial Value Problem

[thaalescosta]

Hello, I'm struggling with a simple problem here.

It asks me to solve the following initial value problem:

So far I've calculated the integration factor μ(x) = e^x-x2 and I multiplied both sides of the equation by it and got this:
http://www4c.wolframalpha.com/Calculate/MSP/MSP36171f59839bdf0g6cbd000044defig6e40h0ei0?MSPStoreType=image/gif&s=64&w=256.&h=47. [Broken]

The problem I'm having is that the equation I got is different than the equation in the first line of the solution:

I don't understand how the e^x-x2⋅(1 - 2x)⋅y disappeared


EDIT: Actually, nevermind. My brain was too lazy to realize that the left part of the equation is equal to the derivative of e^x-x2⋅y so I could just simplify it
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[Simon Bridge]

Well done.