Try these examples in order to explore arithmetic, variables, and Q-expressions.
Basic Evaluation
(+ 1 2 3)(* 2 3 4)(- 10 4)(/ 20 2 2)
Variables
(def {x} 5)(def {y z} 10 20)(+ x 2)(* y z)
Q-Expressions
{1 2 3 4}(head {1 2 3 4})(tail {1 2 3 4})(join {1 2} {3 4})(eval {+ 1 2 3})
Nested + Errors
(+ (* 2 3) (/ 10 2))(head 1)(/ 1 0)