1. 8, -12, [tex]\frac{3}{4}[/tex], -3,5, 1
2. 10xy, x, -y, 5
5a, -b, -3
[tex]a^{2}[/tex], -2ab, [tex]b^{2}[/tex]
3.a 9x-9
b. -3x-3m
c. -4,4x-2,1
d. 0,2[tex]x^{2}[/tex]-1,7x
e. [tex]\frac{8}{6}x-\frac{27}{6}x-\frac{25}{30}-\frac{36}{30}=\frac{19}{6}x-\frac{11}{30}[/tex]
4.a 7x-8+5x-3=12x-11
b. -7a+2
c. 3.2x-4.3
5. a. -8x+3+4x-4=-4x-1
b. 7-2x-8x+12=-10x+19
c. 5+4x-8-12x=-8x-3
