1. What is the sum of (-4m3 – 15m2 + 4m - 6) and (23m3 – 8m2 – 8m – 9)?

2. What is the result if (23x4 + 23x3 + x2 + x + 33) is subtracted from (12x
4 – 11x
3 – x
2 – x + 7)?

3. Subtract 9x3 + 4x + 7x2

from the sum of 3x2 – 7x – x
3
and -8x2 – 7x + 8x3
.

4. Subtract the sum of 2x4 – 3x3 – 4x2 + 2x – 3 and 4x4 – 2x3 + x5 – 11 from 2x4 – 7x5 – 2x3 + 8x2 – 6x + 19.

5. Find the difference when 9x3 – 3x2 – x + 5 is subtracted from 8x3 – 7x2 – 9x – 23.
pls help me po ​