iOS - Complex string comparisons using NSPredicate -

i need compare strings such conditions met. conditions not patterns can match using regex rather "expression" conditions.

for instance match string when number between 2 values:

inputstring = "the price of flight paris 550$ , tomorrow go 150$"  matchingcondition = "the price of flight paris expression( 500 < x < 600)$ , tomorrow go expression(100 < y < 200)$" 

i need run comparison on random texts don't input string in question.

i.e.

inputstring = "blah blah blah" 

i able compare using simple true/false function. i.e.:

match(inputstring,matchingcondition) -> boolean 

examples:

match(inputstring : "the price of flight 400$",matchingcondition : "the price of flight expression( 300$ < x < 401)$") -> true  match(inputstring : "the price of flight 402$",matchingcondition : "the price of flight expression( 300$ < x < 401)$") -> false  match(inputstring : "blah blah blah",matchingcondition : "the price of flight expression( 300$ < x < 401)$") -> false 

is there way accomplish type of comparison (using nspredicate example)