reserve a,b,i,k,m,n for Nat;
reserve s,z for non zero Nat;
reserve c for Complex;

theorem Th4:
  c|^8 = c*c*c*c*c*c*c*c
  proof
A1: 8 = 7+1;
    c|^7 = c*c*c*c*c*c*c by Th3;
    hence thesis by A1,NEWTON:6;
  end;
