i have written a script that produces a obscure mathematical equation to be solved by the user for captha. the equaton is obscured by. 1)having words rather than digits. 2) surrounding words by special characters 3) randomly changin these characters. examples.

1) s^{Fourty:Five|^s +Plus+ s^|Two}^s =
2) +Plus+ =
3) *?Fifteen|* +Plus+ *|Seven?* =
4) dd#Twenty~Three#bb +Plus+ dd#Two#bb =
5)+Plus+ =

as a experienced spam victim – could you possibly tell me how easy or difficult would my captha be to break. plz see example above, it changes on attempt/submit including the two words that comprise numbers of 21 and above.

thanks.