2 mũ 3 .5 +3 mũ 4 .2 -4. (5 mũ 7 :5 mũ 5) (3 mũ5.3 mũ7):3 mũ 10+5.2 mũ4 2 2. [(7-3 mũ 3 : 3 mũ2): 2 mũ 2 +99]-100 3 mũ 4.2 +2 mũ 3.5-7 (5 mũ2 -5)

a. 2³ . 5 + 3^4 . 2 - 4 . (5^7 : 5^5)

= 8 . 5 + 81 . 2 - 4 . 5²

= 40 + 162 - 4 . 25

= 202 - 100

= 102

b. (3^5 . 3^7) : 3^10 + 5 . 2^4

= 3^12 : 3^10 + 5 . 16

= 3² + 80

= 9 + 80

= 89

c. 2 . [(7 - 3³ : 3²) : 2² + 99] - 100

= 2. [(7 - 3) : 4 + 99] - 100

= 2. [4 : 4 + 99]  - 100

= 2. [1 + 99] - 100

= 2. 100 - 100

= 200 - 100

= 100

d. 3^4 . 2 + 2³ . 5 - 7 . (5² - 5)

= 81 . 2 + 8 . 5 - 7 . 5

= 162 + 40 - 35

= 167