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5 1:
1 , . 4 , 2.
2 [4]
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4. | . | |
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3 [5]
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1 = . . - . . | ||
1 = + . () . . | ||
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3 .
4 ( , ).
5 .
:
1. = ;
2. = ;
3. = ;
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4. = .
3.