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1. a) 5² * 3 + 7² - 2 - 15
= 25 * 3 + 49 - 2 - 15
= 75 + 49 - 2 - 15
= 75 + 49 - 17
= 104 - 17
= 87

2. b) 2 * 5² - [30 - (7 - 2)² + 2³]
= 2 * 25 - [30 - 5² + 8]
= 50 - [30 - 25 + 8]
= 50 - [30 - 25 + 8]
= 50 - [30 - 25 + 8]
= 50 - 13
= 37

3. c) 30 + [50 : (9 - 4)² + 2 * 6]
= 30 + [50 : 5² + 12]
= 30 + [50 : 25 + 12]
= 30 + [2 + 12]
= 30 + 14
= 44

4. d) 35 - 5 * 3² - (5 - 4)³
= 35 - 5 * 9 - 1
= 35 - 45 - 1
= 35 - 46
= -11

5. d) 35 - 3² - 5 * (5 - 4)³
= 35 - 9 - 5 * 1
= 35 - 9 - 5
= 35 - 14
= 21

Tóm lại, các kết quả là:

a) 87
b) 37
c) 44
d) -11
d) 21