.NET Regex Tester - Regex Storm

Pattern

Input

Sum(a;b)
Sum(a)
Sum(Sum(a;c);b)
Sum(Sum(a);Sum(b;d))
Sum(Sum(Sum(a;b);Sum(c;d));Sum(b;d))

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5 matches found in about 5 milliseconds.

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Index	Position	Matched String	$1	$2	${c}
0	0	Sum(a;b)	a	b	empty string
1	10	Sum(a)	a	empty string	empty string
2	18	Sum(Sum(a;c);b)	Sum(a;c)	b	empty string
3	35	Sum(Sum(a);Sum(b;d))	Sum(a)	Sum(b;d)	empty string
4	57	Sum(Sum(Sum(a;b);Sum(c;d));Sum(b;d))	Sum(Sum(a;b);Sum(c;d))	Sum(b;d)	empty string

Sum(a;b)
Sum(a)
Sum(Sum(a;c);b)
Sum(Sum(a);Sum(b;d))
Sum(Sum(Sum(a;b);Sum(c;d));Sum(b;d))