A=4+10a+8a-6+1-3a 15a-1 15a^{2}-1 15a-3 15a^{2}-3 A=3x+5-2x+3x^2-2x^2 x^2+x+5 2x+5 6x^2+4x-5 2x^2+x-5 A=4x-x^2+6-4x+2x^2-3 x+3 x^2+8x+3 x^3+3 x^2+3 A=2-2z+z-1-3+3z 4z-4 2z-2 2x-2 2z^2-2 A=6y-3+4y+y-7+4 10y-6 11y+6 11y-6 -11y+6 A=9a+6+5-3-7a+4a 3a+4 5a+8 6a+4 6a+8