mydata<-data.frame(Dates1=c("25/06/1983", "25-08/2014", "2001/11/01", "2008-10-01"),
Dates2=c("01/01/85", "04/04/1982", "07/12-2016", NA),
Numeric1=rnorm(4))
mydata <- fix_dates(mydata)
mydata
tracking <- track_changes(mydata)
mydata_r <- restore_changes(tracking)
mydata_r
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