Recurrence 1 certificate: ShiftTerm2

This file is a checked bounded-band arithmetic shard for the first pseudo-division recurrence in the order-seven branch-zero resultant certificate.

theorem MazurTorsion.Kubert.OrderSevenBacktrackingCertificate.Internal.ResultantCertificate.recurrence1ShiftTerm2_eq : recurrence1Remainder26 * recurrence1Remainder21 = recurrence1ShiftTerm2