You can use the following API to evaluate an expression
 

	public static Object evaluate(String expression) {
		...
	} 

	public static Object evaluate(String language, String expression) {
		...
	}

 

The following code fragment shows how to evaluate expressions in ALH API

result = ALH.evaluate("a+b");
ALH.setValue($context$, "display", result);

 

If no language is defined, the default language will be used (JavaScript).