protected Relation(MathStatement left, MathStatement right)
 {
     Left  = left;
     Right = right;
 }
 public static EqualsOp Create(MathStatement left, MathStatement right)
 {
     return(new EqualsOp(left, right));
 }
 private EqualsOp(MathStatement left, MathStatement right) : base(left, right)
 {
 }
 public static MathStatement Create(BigInteger left, MathStatement right) => Create(Literal.Create(left), right);