33-7+5-1=30; 35-7+1+1=30; 37-5-1-1=30
Можно вот так: 13+7+9+1=30; 31-7+3+3=30; 17+9+5-1=30
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33-7+5-1=30; 35-7+1+1=30; 37-5-1-1=30
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Можно вот так: 13+7+9+1=30; 31-7+3+3=30; 17+9+5-1=30