String: func2(func1(input1, input2), input3)
     Match succeeded
     ---------------
     Before brackets:-
       -->func2<--
     Bracket pairs:-
          (input1, input2)
          (func1(input1, input2), input3)
     After brackets:-
       --><--

String: func1(input1, func2(input2, input3))
     Match succeeded
     ---------------
     Before brackets:-
       -->func1<--
     Bracket pairs:-
          (input2, input3)
          (input1, func2(input2, input3))
     After brackets:-
       --><--

String: Contains i(mbalan(ced Br(ack)ets, )one op)en m)missing
     Match failed

String: So(me m(ultip)le n(est(s in) thi)s o)ne
     Match succeeded
     ---------------
     Before brackets:-
       -->So<--
     Bracket pairs:-
          (ultip)
          (s in)
          (est(s in) thi)
          (me m(ultip)le n(est(s in) thi)s o)
     After brackets:-
       -->ne<--