Special cases for inserting a modified term with one when k=m*a3

Recall that

When b₂=2

    for any m

When b₂=2 and m=1

When b₂=2 and m=-2

by Rule 3(both->next) and Rule 1(up->front) of signs in 0109

When b₂=-2

     by Rule 2(down->front and next)

   for any m

When b₂=-2 and m=-1

When b₂=-2 and m=2

by Rule 3(both->next) and Rule 1(up->front) of signs in 0109