Can someone me with this question?

match each rational expression to its simplest form.

1. 2m^2(squared) -4m over 2(m-2),
2. m^2 -2m+1 over m-1,
3. m^2-3m+2 over m^2 -m,
4. m^2-m-2 over m^2 -1,

m-2 over m,
m-1,
m-2 over m-1,
m