Hi I'm having trouble with this question and was hoping for a push in the right direction...

I've been given the boolean function

and been asked to apply the karnaugh map method to it.

However I don't know how to get straight from that function to a Karnaugh map and I'm having trouble with the algebra in trying to get rid of the signs.

I've gotten as far as

and I'm finding the rest of the algebra messy and intimidating. I don't think I'm on the right track.

I'd really appreciate some pointers, thanks in advance!