1. $x^6$

3. $x^7$

5. $2b^6$

7. $m^2$

9. $\hspace{0.17em}-\hspace{0.17em}{\displaystyle \frac{1}{7n^4}}$

11. $P^8$

13. $a^{30}{T}^{60}$

15. ${\displaystyle \frac{8}{b^3}}$

17. ${\displaystyle \frac{x^8}{16}}$

19. 1

21. $\hspace{0.17em}-\hspace{0.17em}3$

23. ${\displaystyle \frac{1}{6}}$

25. $R^2$

27. $\hspace{0.17em}-\hspace{0.17em}{t}^{14}$

29. $\hspace{0.17em}-\hspace{0.17em}{L}^2$

31. ${\displaystyle \frac{1}{8}}$

33. 1  

35. ${\displaystyle \frac{a}{x^2}}$

37. ${\displaystyle \frac{64s^6}{g^2}}$

39. ${\displaystyle \frac{x^3}{64a^3}}$

41. ${\displaystyle \frac{5n^3}{T}}$

43. $\hspace{0.17em}-\hspace{0.17em}53$

45. 253

47. $\hspace{0.17em}-\hspace{0.17em}0.421$

49. 114

51. Yes

53. 625

55. 1

57. ${\displaystyle \frac{G^2{k}^5{T}^5}{h}}$ 

59. ${\displaystyle \frac{r}{6}}$

61. $3212.27

63. 2, 2.5937, 2.7048, 2.7169

65. 277 ft

67. ${\mathrm{85,600 ft/min}}^2$

69. 14.9 L

71. ${\mathrm{38.0 in.}}^2$

73. 12,800 ft/min

75. 39.6 cm

77. 90,700 L/h

79. 1240 km/h

81. 101,000 Pa