If it's clear that we're uniformly talking about the same box type (in
this example, `α list`), we can equivalently write
-<code><u>int</u> -> <u><u>int</u></u></code>
+<code><u>int</u> -> <span class="box2">int</span></code>
Here are some examples of values of these Kleisli arrow types, where the box type is `α list`, and the Kleisli arrow types are <code>int -> <u>int</u></code> (that is, `int -> int list`) or <code>int -> <u>bool</u></code>: