is to_num(
'ameritrade'
),
'(263) 748 7233'
;
is to_num(
'ameritra33'
),
'(263) 748 7233'
;
is to_num(
'26e.ritra33'
),
'(263) 748 7233'
;
is to_num(
'(26e) rit ra33'
),
'(263) 748 7233'
;
is to_num(
'123a334'
),
'123 2334'
;
ok ! to_num(
'a33'
);
#is to_num('boat'), '2628';
#is to_num('tellverizon'), '835-5837 4966';