Derivative of self-energy in Peskin Schroeder equation 7.31

[dosantos86]

I can't do the derivative 7.31 at page 221. I try to do the derivative of Σ in dp slash, but my result is different from 7.31
Someone can help me writhing the right derivative?

Thank you in advance!

 

[rickz02]

Can you elaborate here using the PF format. Also show us first what you've done so far. Thanks.