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9r-4(-5r-5)<-9r+10+5
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9r-4(-5r-5)<-9r+10+5

User Pradeep Kesharwani
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Hello !


9r-4(-5r-5)<-9r+10+5\\9r+20r+20<-9r+15\\29r+20<-9r+15\\38r<-5\\r<(-5)/(38)
Have a nice day
User Edgard
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