x+1/x-1-x-1/x+1/18x+3/x*-1
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Answer:
1-1=0
1-0=1
1+1=2
18+2=20
20+3=23
23-1=22
1/1=1
1/1=1
1/1=1
1/18=18
18+3=21
21/1=21
21*1= 21 answer ok
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