А
1. 18y³ + 6y³
2. 18y³ -6y³
3 9x + (-x)
4. 9x - (-x)
5. (-8x³) + (-7x³)
6. (-8x³) - (-7x³)
7. (4x³-3x²-x) + (-10+5x³-x²+x)
8.(4x³-3x² -x) - (-10+5x³-3x²+x)
9. (5x³-2x³ +7x²+4) + (5x³-2x³ +7x²+4)
10. (5x³-2x³+7x²+4) - (5x³-2x³ +7x² +4) +

Column B
A -15x³
B-X³
C. -x³ - 2x + 10
D. 0
E. 6x³ +14x²+8
F 8x
G 9x³-4x²-10
H 10x
L 12y³
J. 24y³​