g)
[tex]-2x^3-8x-4+2x^2-6+2x-x^3-3x-4x^2+6x-1=-2x^3-x^3+2x^2-4x^2-8x+2x-3x+6x-4-6-1=-3x^3-2x^2-3x-11[/tex]
h)
[tex]8-7x-x^3+4x^2-6x-5x^2-2+10x-4x^3-2x=-x^3-4x^3+4x^2-5x^2-7x-6x+10x-2x+8-2=-5x^3-x^2-5x+6[/tex]
3. a)
[tex]7a^2-2ab+3b^2-5a+2b-4a^2+3ab+2b^2-4a+3b=7a^2-4a^2+3b^2+2b^2-2ab+3ab-5a-4a+2b+3b=3a^2+5b^2+ab-9a+5b[/tex]
b)
[tex]8a^2+3ab+4b^2-6a-5b+2a-6b^2-3ab+a^2=8a^2+a^2+4b^2-6b^2+3ab-3ab-6a+2a-5b=9a^2-2b^2-4a-5b[/tex]
c)
[tex]4x^3-2y^3+5x^2y-2xy^2-5x^3+2y^3-6xy^2-3x^2y=4x^3-5x^3-2y^3+2y^3+5x^2y-3x^2y-2xy^2-6xy^2=-x^3+2x^2y-8xy^2[/tex]
d)
[tex]x^3+4y^3-6x^2y-2xy^2-3x^2y+3xy^2-5x^3-3y^3=x^3-5x^3+4y^3-3y^3-6x^2y-3x^2y-2xy^2+3xy^2=-4x^3+y^3-9x^2y+xy^2[/tex]
