import UIKit
func calculatorFromString(colculation:String)->Double{
let mathExpression = try NSExpression(format: colculation)
let mathValue = mathExpression.expressionValue(with: nil, context: nil) as? Double
return mathValue!
}
calculatorFromString(colculation: "5*(1+4)")
when I set colculation equal "5*(1+4)))", this is a error and I dont know how to catch exception. Thank you!