public PolynomialMonomialVariableNameException(PolynomialMonomial first, PolynomialMonomial second) :
base(GetMessage(first, second))
{
}
private static string GetMessage(PolynomialMonomial first, PolynomialMonomial second)
{
return
($"Polynomials have {first.VariableName} and {second.VariableName} VariableName, but they must be equal");
}