1.2a + 4 + 3a
a.6a + 3
b.5a + 4
c.4a + 5
d.9a + 3a

2.( x + 3 ) + ( 2x + 3) *
a.3x + 5x
b.2x +6
c.3x + 6
d.3x + 9

3.(y2+8y)+(2y+7)
a.y2+10y
b.y2+10y+7
c.10yt+y+x
d.11y+10

4.(-b -2) + (2b +6) *
a.3b + 8
b.b + 4
c.b + 8
d.2b + 4

5.(x + 8) +2x *
a.x + 8
b.-x - 8
c.3x + 8
d.8x + 3

6.(m + 3) - (-m +6) *
a.-m + 9
b.m + 9
c.2m - 3
d.2m +3

7.(3x2+y)-(2x2-8)
a.x2+y+8
b.5x2+y+8
c.3x2+y+8
d.x2+8y

8.(7a +3c) - (-3c +1) *
a.7a +1
b.7a + 6c +1
c.7a +9c -1
d.7a +6c -1
​