public void CloneTest()
{
var exp = new Csch(new Number(1));
var clone = exp.Clone();
Assert.Equal(exp, clone);
}
/// <summary>
/// Differentiates the specified expression.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="variable">The variable.</param>
/// <returns>Returns the derivative.</returns>
protected virtual IExpression Csch(Csch expression, Variable variable)
{
var coth = new Coth(expression.Argument.Clone());
var mul1 = new Mul(coth, expression.Clone());
var mul2 = new Mul(_Differentiate(expression.Argument.Clone(), variable), mul1);
var unMinus = new UnaryMinus(mul2);
return unMinus;
}