Regular expression validation

Question

I need regular expression for

1)fax

like

+(country code)-(area code)-(fax number)

for example: [phone] and with error message,if miss '-' then show 'missing '-'', if missing '+' then show 'missing '+''.

2)Marks 

like

0-100 digits can only enter..not above 100 like 101...200....

3)AcademicYear 

like

yyyy-yyyy

4)Tax

5)Shift