How to combine conditional statements in Lotus Notes formula language? -

i migrating lotus notes sharepoint. trying define lotus notes formula match records migrate. lotus notes noob. not equal operator in lotus notes , , operator. have:

form!="credit hold secured" , form!="credit card" , @matches(@left(companyname;1);"{0-9}")

to combine conditional statements or formulas return true/false (boolean) value, use ampersand specify "and", pipe specify "or", , exclamation point specify "not":

form != "credit hold secured" & form != "credit card" & @matches(@left(companyname;1);"{0-9}") 

note, cleaner way check matching form name is:

@isnotmember(form; "credit hold secured":"credit card") 

which return true if form name not in list of string values. makes easier add new form list in future.