Answer:
[{(-15+30)x4+40] / 1/2}2
Explanation:
sorry this is only one, but this is the steps
1. -15 + 30 = 15
2. 15x4 = 60
3. 60 + 40 = 100
4. 100 / 1/2 = 50
5. 50 x 2 = 100
sorry if this is incorrect, but I hope this helps ;-}
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