dhanarNaShaD vidhama - 7 ## (Addition and Subtraction 7) ## 
2007-04-24 ma~NgalavaasaraH ##(2007-04-24 Tuesday)##
ruupaaNaamavyaktaanaaM naamaadyaxaraaNi lekhyaani|
upalaxaNaaya teShaamRRiNagaanaamuurdhvabinduuni||7||
##Of the unknown quantity, the first letter should be written to indicate it and in that the negative ones should be marked with a dot on it.##