/// <summary>
/// Analyzes the specified expression.
/// </summary>
/// <param name="exp">The expression.</param>
/// <returns>
/// The result of analysis.
/// </returns>
public override IExpression Analyze(Sqrt exp)
{
if (!Helpers.HasVariable(exp, Variable))
{
return(new Number(0));
}
var mul = new Mul(new Number(2), exp.Clone());
var div = new Div(exp.Argument.Clone().Analyze(this), mul);
return(div);
}