(A);
(,,(,));
(A,B,(C,D));
(A,B,(C,D)E)F;
(:0.1,:0.2,(:0.3,:0.4):0.5);
(:0.1,:0.2,(:0.3,:0.4):0.5):0.0;
(A:0.1,B:0.2,(C:0.3,D:0.4):0.5);
(A:0.1,B:0.2,(C:0.3,D:0.4)E:0.5)F;
((B:0.2,(C:0.3,D:0.4)E:0.5)F:0.1)A;