(2x+3y+8z)+(7x+11y+2z)
(4x3+5x-7x2+9)+(6x3-4x+3x2-3)
(8y+3x+2z)+(5y+4x+5z)
(4x+3y-8z)+(7x-8y+5z)
(5x+4y+3z)+(2x+4y+6z)
7x+8y+9z
9x+14y+10z
11x-5y-3z
13y+7x+7z
10x3+x-4x2+6
