g(g^2+g^3+1)-(g^3+g^4-9a) 3(r-g)-(r+g^2-8g)+g^2 z(z^2+2z+3)-z^2(z+2) 3(o-k)-(k-o)+2(o+2k)+8z 6(2+e)-7e^2-2(e+6)+7e^2+7r 7w^2-6w^2-(w^2-4s)-(s^2-w)+s^2 5n+o(o^2-1)+4(o-o3)+3o^3 4(y+y^2)-6y^2+2(y^2+y+1)-2

g(g^2+g^3+1)-(g^3+g^4-9a)= g^2+g^4+g-g^3+g^4-9a=g^2+2g^4-g^3+g-9a 3(r-g)-(r+g^2-8g)+g^2=3r-3g-r-g^2+8g+g^2=2r+5g z(z^2+2z+3)-z^2(z+2)=z^3+2z^2+3z-z^3-2z^2=3z 3(o-k)-(k-o)+2(o+2k)+8z=3o-3k-k+o+2o+4k=6o 6(2+e)-7e^2-2(e+6)+7e^2+7r=12+6e-7e^2-2e-12=-4e-7e^2 7w^2-6w^2-(w^2-4s)-(s^2-w)+s^2=7w^2-6w^2-w^2+4s-s^2+w+s^2=4s+w 5n+o(o^2-1)+4(o-o^3)+3o^3=5n+o^3-o+4o-4o^3+3o^3=5n+3o 4(y+y^2)-6y^2+2(y^2+y+1)-2=4y+4y^2-6y^2+2y^2+2y+2-2=6y