public static Numeral Pow(this Numeral mantissa, Numeral exponent) => ChurchNumeral.Pow(mantissa)(exponent);
public static Numeral Multiply(this Numeral a, Numeral b) => ChurchNumeral.Multiply(a)(b);
public static Numeral Subtract(this Numeral a, Numeral b) => ChurchNumeral.Subtract(a)(b);
public static Numeral Add(this Numeral a, Numeral b) => ChurchNumeral.Add(a)(b);
public static Numeral Decrease(this Numeral n) => ChurchNumeral.Decrease(n);
public static Numeral Increase(this Numeral n) => ChurchNumeral.Increase(n);