## Algebra 1: Common Core (15th Edition)

2$g^{4}$ - $g^{3}$ + 9g + 9
STEP 1: Write out the original expression. (2$g^{4}$ - 3g + 9) + (-$g^{3}$ + 12g) STEP 2: Combine like terms to obtain: 2$g^{4}$ - $g^{3}$ + 9g + 9