code: public static <A extends Number & Comparable<?>> NumberExpression<Double> coth(Expression<A> num) {
          return Expressions.numberOperation(Double.class, Ops.MathOps.COTH, num);
      }
docs: Create a {@code coth(num)} expression
  
  <p>Returns the hyperbolic cotangent of num.</p>
  
  @param num numeric expression
  @return coth(num)