Category 1
9y + 4 - 6y
3y + 4
8x + 13 - 3x + 9
5x + 22
y2 + 3y2
4y2
10x(2x + 10)
20x2 + 100x
3x + 5 + 7x
10x + 5
4x + 15 - 3x + 10
x + 25
10x + 2x - 12x
0
2(x + 4)
2x + 8
4 (3x + 11)
12x + 44
5(x - 9)
5x - 45
9(y + 1/3)
9y + 3
3.2m + 4.6m
7.8m
2.2(x + 12.3)
2.2x + 14.5