2m^2 - 4m 2m(m-2)
-------------- = --------------- = m
2(m-2) 2(m-2)
m^2 - 2m + 1 (m - 1)^2
----------------- = --------------- = m-1
m-1 m-1
m^2 - 3m + 2 (m-1)(m-2) (m-2)
------------------- = ------------------- = -----------------
m^2 - m m(m-1) m
m^2 - m - 2 (m+1)(m - 2) m-2
---------------- = ------------------ = ---------
m^2 - 1 (m+1)(m-1) m -1
