[a] ,
[a] .
[a]+ , .
[a] ,
[q]3:1: :
[a]
[a]+ ,
[a] , .
[a] , .
[q]3:1: :
[a] , .
[a] + .
[a] , .
[a] , , , .
[q]3:1: :
[a] , .
[a] + .
[a] , .
[a] , , , .
[q]3:1: :
[a] , .
[a]+ , , , .
[a] .
[a] , .
[q]3:1: :
[a]+ , ( , , ) .
[a] .
[a] .
[a] , .
[q]3:1: :
[a] 2- , .
[a]+ , (, )
[a] , .
[a] .
[q]3:1: :
[a]+ ,
[a] , , , .
[a] .
[a] ,