I am not sure how to write the following code in Crystal Reports. I am putting the code in the Group Section_visibility area. So I don't show times in my report that don't meet the criteria. Here's the criteria. If a time exists and it is between 30 and 90 seconds then show it. And I compare FA time to FB time so I know which time between FA and FB to look at in the 30 to 90 seconds range.
Here's my code which gives me an error because the syntax is longer correct since I added the FB time variable to the mix. Thanks for the help. I will keep working on it too.

If IsTime ({master.T_FA_ATPT}) and IsTime ({master.T_FB_ATPT}) and IsTime ({master.T_SHOCK}) and
  Time({master.T_FA_ATPT}) < Time({master.T_FB_ATPT}) then
Time({master.T_SHOCK})-Time({master.T_FA_ATPT})<30 or
Time({master.T_SHOCK})-Time({master.T_FA_ATPT})>90

If IsTime ({master.T_FA_ATPT}) and IsTime ({master.T_FB_ATPT}) and IsTime ({master.T_SHOCK}) and
  Time({master.T_FB_ATPT}) < Time({master.T_FA_ATPT}) then
Time({master.T_SHOCK})-Time({master.T_FB_ATPT})<30 or
Time({master.T_SHOCK})-Time({master.T_FB_ATPT})>90

If IsTime ({master.T_FA_ATPT}) and Not IsTime ({master.T_FB_ATPT}) and IsTime ({master.T_SHOCK}) then
Time({master.T_SHOCK})-Time({master.T_FA_ATPT})<30 or
Time({master.T_SHOCK})-Time({master.T_FA_ATPT})>90

If Not IsTime ({master.T_FA_ATPT}) and IsTime ({master.T_FB_ATPT}) and IsTime ({master.T_SHOCK}) then
Time({master.T_SHOCK})-Time({master.T_FB_ATPT})<30 or
Time({master.T_SHOCK})-Time({master.T_FB_ATPT})>90