/// <summary>
/// Method for subtracting field element <paramref name="b"/> from field element <paramref name="a"/>
/// </summary>
/// <param name="a">Minuend</param>
/// <param name="b">Subtrahend</param>
/// <returns>Difference</returns>
public static FieldElement Subtract(FieldElement a, FieldElement b)
{
var c = new FieldElement(a);
return(c.Subtract(b));
}