(-r-p)^2(-n-4)^2(-m-7)^2 = (r^2 + 2rp + p^2)(n^2 + 8n + 16)(m^2 + 14m + 49)= r^2n^2m^2 + 14r^2n^2m + 49r^2n^2 - 8r^2nm^2 - 112r^2nm - 392r^2n + 2r^2m^2 + 28r^2m + 98r^2
(-r-p)^2(-n-4)^2(-m-7)^2 = (r^2 + 2rp + p^2)(n^2 + 8n + 16)(m^2 + 14m + 49)
2rn^2m^2 + 28rn^2m + 98rn^2 - 8rnm^2 - 112rnm - 392rn + p^2n^2m^2 + 14p^2n^2m + 49p^2n^28p^2nm^2 - 112p^2nm - 392p^2n + 2p^2m^2 + 28p^2m + 98p^2.= r^2n^2m^2 + 14r^2n^2m + 49r^2n^2 - 8r^2nm^2 - 112r^2nm - 392r^2n + 2r^2m^2 + 28r^2m + 98r^2