On addition, you can just combine like terms. 2v^3+(-v^3)=v^3 -v+v cancels each other out 8+(-3)=5 So you have v^3+5
14 On subtraction, you have to remember to distribute the negative sign so after you do that you have: 4h^3+3h+1+5h^3-6h+2 Then you can combine like terms 4h^3+5h^3=9h^3 3h-6h=-3h 1+2=3 So you end up with: 9h^3-3h+3
Hope that helps and feel free to ask any questions.
