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2014-06-05T13:58:43+03:00
20+10x{30+200:[70-480:(90-40:4)}=20+10x{30+200:[70-480:80]}=20+10x{30+200:[70-6]}=
20+10x(30+200:64)=20+10x(30+25/8)=20+10x265/8=20+1325/4=1405/4