( 1 . 2 . 3 ) 1
1431/1432
+ (( 2 . 3 )) 1 1432.
(( )) 1 1431_1432.
(( )) 1 1431_1432.
(( )) 1 1431_1432.
(( )) 1 1431_1432.
+ (( )) 1 1431_1432.
+ (( )) 1 1431_1432.
+ (( )) 1 1431_1432.
+ (( )) 1 1431_1432.
(( 2 . 3 )) 1.
1 1431_1432.[/align][/QUOTE]
(( 1 )) + .
(( 1 )) + .
1 1431_1432.
(( ))
.
3 1.