procedure recursiveTraversal(vExpressionString : string; currentNode : expressionNode);
begin
    writeln('HERE ', vExpressionString);
    brackets := 0;
    for i := 1 to length(vExpressionString) do begin
        ch := vExpressionString[i];
        writeln(i, ' ', ch, ' ', brackets);
        if(ch = '(') then
            inc(brackets)
        else if(ch = ')') then
            dec(brackets);
        if((ch = '+') and (brackets = 0)) then begin
            writeln(vExpressionString);
            recursiveTraversal(copy(expressionString, 1, i-1), currentNode);
        end;
    end;
end;

========
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1
12 * 1
13 ( 1
14 3 2
15 + 2
16 1 2
17 ) 2
18 ) 1
19 + 0
(10+1)*(5+6*(3+1))+4*(3+1)
1 ( 0
2 1 1
3 0 1
4 + 1
5 1 1
6 ) 1
7 * 0
8 ( 0
9 5 1
10 + 1
11 6 1