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( , ) 15 = 32 .
7,5 , 15 =50 .
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1.
" ", " ( ) ( )"
, 32 50 . .. 18 "": 50-32.
50\18=2,7. 2,7 , , "" 2 3 . , "" 20 , 18-.
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2.
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3.
4.
5.
, 6:
6
"" . , , "" , 7.
7.
, 8.
8.
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