Although I'm second-guessing my let example now. Lets are great for assigning names to your building blocks, but I don't really like using them to obscure my processing flow as above. Perhaps this would be a better compromise:

    (defn example [n]
      (let [square #(* % %)
            halve  #(/ % 2.0)
            add3   #(+ % 3)]
        (-> n square halve add3 str)))
    
    > (example 1)
    "3.5"