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=-1522151+2=3+1 55+--5+2212-321 =35==35+5=2+-=- +513523=3355512 231=3-+52355+2+ 3+513+333125+13 3-+==21+=51=1-3 5125+1-13353+52 +2-+3123-321-5+ 2+11-3+-==3=125 +1=51=3-+5=3-3- +++5=--1==-3312 5+2+2=551+-5=13 32-3+=53++-32+5 =2-=--223+-+115
1.
1+2=3
2.
3-1=2
3.
2-3=5