How do you combine like terms for #-7mn-2mn^2-2mn + 8#?
In this expression only the first
The second term
Imagine that like terms are objects. You can add or subtract together the same objects (for example 5 apples+2 apples= 7 apples) while you CANNOT do it with different objects (for example: 3 apples + 5 chairs=???)
In your case you can now write: