可唔可以幫手計多項式???

化簡:
1.(2a+3b-4)+(5a-b+7)

2.(7c-8d-11)-(-c+8d+2)

3.(2x^2-3x+5)+(x^2-7x-9)

4.(1-c-c^2)+(2c+3c^2)

用展開法展開下列各式:

5.(x+1)(x^2+x+1)

6.(x^2-x+2)(x-1)

7.(x^2-2x+7)(x+3)

8.(x+2)(x^3+x^2-6x)

用長乘法展開下列各式:

9.(x+2)(x^2-2x-1)

10.(x^2+5x+3)(x-2)

11.(x^2-3x+5)(x+8)

12.(x-7)(x^3-x^2-2x)

求下列各題的商式:

13.(2x^2-5x-12) / (x-4)

14.(-x^2-2x+3) / (x-1)

15.(-2x^2-15x-27) / (x+3)

16.(-3x^2+26x-35) / (x-7)

求下列各題的商式及餘式:

17.(x^2+2x+3) / x

18.(-7x^4+9x^2) / (-x)

19.(x^2-4x+5) / (x-1)

20.(2x^2-7x+11) / (x-2)

21.(4k^3-2k^2+5k-12) / (2k^2-k+3)

22.(2y^3-2y^2+1) / (2y^2-1)

挑戰題:

23.(2x^2-3x+1)(2-3x)