?repeats the group contents below at most once:
\(?optionally matches the literal ( (4010 / 508 / 2816)
0{1,2}the literal 0 (4810 / 608 / 3016) , repeated between 1 and 2 times
\+the literal + (4310 / 538 / 2B16)
\d{1,2}a digit, repeated between 1 and 2 times
\)?optionally matches the literal ) (4110 / 518 / 2916)