String: Cont(ains balanced( nested Br(ack)ets )in t)he text
     Match failed

String: Con(tains i(mbalan(ced Br(ack)ets, )one c)lose missing
     Match failed

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

String: No brackets in this string
     Match failed

String: Won)ky br(ackets in) this s(tring
     Match failed

String: More wonky br(ackets in) th)is s(tring
     Match failed

String: Just the one( leading bracket
     Match failed

String: And just th)e one trailing bracket
     Match failed

String: So(me m(ultip)le n(est(s in) thi)s o)ne
     Match failed

String: Ther(e is( mo(re) de(e)p )nes(ti(n(g i)n (mul)ti)p(l)es) he)re
     Match failed

String: Some d((oub)le b)rackets
     Match failed

String: ab(())cde
     Match failed

String: ab(c(d)e
     Match failed

String: ab(c)d)e
     Match failed