I need to get from
[(1-p)f+p(1-f)](1+v)-[(1-p)(1-f)+pf] = x
to (2+v)(f+p-2pf)-1 = x
but I'm stuck. I'd appreciate any tips on what I should I do after the following.
(f+p-2pf)(1+v) + (f + p - 2pf) - 1 = x
Thanks in advance.
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