9. 120
11. 12
13. 15
15. 1
17. 7
19. 1
21. 4950
23. 210
25. (x+2)4=x4+8x3+24x2+32x+16
27. (x−2)5=x5−10x4+40x3−80x2+80x−32
29. (2−3x)3=−27x3+54x2−36x+8
31. (2x+3y)4=16x4+96x3y+216x2y2+216xy3+81y4
33. (x+1)4=x4+4x3+6x2+4x+1
35. (x−1)5=x5−5x4+10x3−10x2+5x−1
37. (y−3)3=y3−9y2+27y−27
39. (x+y)6=x6+6x5y+15x4y2+20x3y3+15x2y4+6xy5+y6
41. (1+3y)5=243y5+405y4+270y3+90y2+15y+1
43. (2x+1)4=16x4+32x3+24x2+8x+1
45. (x−2y)3=x3−6x2y+12xy2−8y3
47. (2x+y)4=16x4+32x3y+24x2y2+8xy3+y4
49. (x2+2)7=1128x7+732x6+218x5+352x4 +70x3+168x2+224x+128
51. (a2−13)4=a8−43a6+23a4−427a2+181
53. (1x+y)3=y3+3y2x+3yx2+1x3
55. 36
57. 1512
59. 314,928
61. 126
63. 120x7y3
65. −112, 640x3
67. 16, 128x6y2
69. −704,000x2y9
71. 84x3
73. 280x3y4
75. 405x8y5
77. 2.48832
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