Seems to be impossible.
The leading factor is 1 / ( 2^m 24 Delta^4).
I introduced some abbreviations to render the output more4 readable, Getting rid of the leading factor I arrive at polynomials in P.P, written here as simply p, the highest exponent seems to be 3, and the coefficients of p^k are polymomials in f = f[ x1, x2, alpha ] and Delta, but I can't see any system.
Perhaps you have some more ideas?
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