First, combine like terms. In other words, combine (2m/3) and (5m/6). Note that you'll need to identify and use the LCD here; it is 6.
Next, combine -1 1/6 and -1 1/3. Converting those into improper fractions first, we get -7/6 and -4/3. Again the LCD is 6. Combine these two fractions.
Now add your two results together and you'll be done.
