1. Collect like terms.
(6g^2+2g^2-3g^2)+(6-2)+(-4g+5g+2g)
2. Simplify
5g^2+4+3g
Sorry i'm hoping that helps, i'm on a school computer i cant see the picture you attached but i did 6g^2 + 6 - 4g + 2g^2 - 3g^2 + 5g + 2g - 2 because that's what it seemed you were asking.