math
posted by annonomus .
(2x4 + 3x3  4) + (3x4  2x3  8)

combine similar terms
(2x4 + 3x3  4) + (3x4  2x3  8)
2x^4 + 3x^4 + 3x^3  2x^3  4  8
*for terms with variables, add their numerical coefficients (or the numbers before them), thus:
5x^4 + x^3  12
so there,, :)