The expression feature is now available in beta as a native Rule Engine feature! If you’re part of our beta program, you should be able to see the post in the beta category.
Update: the expression feature is now released in production! Check out the expressions documentation for more details!
If you’re not part of the beta program, you can use the /math endpoint noted above or send a PM to @support with your math/date expression use-case and we can get you added to the beta group!
Using a variable that contains an array will no longer “pretty print” arrays as the new expression feature enables custom formatting.*