public double power (double number, double power){
	    return (Math.exp(power*Math.log(number)));
}

public double power (double number, double power){
	   return (Math.exp(multiplication(power,log(number))));
}

private double multiplication (double someNumber, double anotherNumber){
     return someNumber*anotherNumber;
}

private double log(double someNumber){
     if (someNumber> 0 )return Math.log(someNumber);
     else throw new Error("не Айс");
}

public double power (Double number, Double power){
     if ((number == null) or((power == null)) throw new Error ("null exception"); 
     return (Math.exp(multiplication(power,log(number))));
}

private double multiplication (Double someNumber, Double anotherNumber){
     if ((someNumber == null) or((anotherNumber == null)) throw new Error ("null exception"); 
     return someNumber*anotherNumber;
}

private double log(Double someNumber){
     if (someNumber == null) throw new Error ("null exception"); 
     if (someNumber> 0 )return Math.log(someNumber);
     else throw new Error("не Айс");
}

public double step (Double chisl, Double stepChisl){
     if ((chisl== null) or((stepChisl== null)) throw new Error ("null exception"); 
     return (Math.exp(umnog (stepChisl,logУ(chisl))));
}

private double umnog (Double chisl, Double drChisl){
     if ((chisl== null) or((drChisl== null)) throw new Error ("null exception"); 
     return chisl*drChisl;
}

private double logE(double chisl){
     if (chisl== null) throw new Error ("null exception"); 
     if (chisl> 0 )return Math.log(chisl);
     else throw new Error("не Айс");
}