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2.7-3-5+10=19
3.20-9+11-5=17
4.-9+4-5+11=1
5.-10+9-9+4=-6
6.-2+11+9-30=-12
7.-1000+250-500+150=900
8.-60-9+70=1
9.-100-75+200-12=13
10.187×75=14025