update snippets 16-31

snippets/compose.md

@@ -7,10 +7,11 @@ The last (rightmost) function can accept one or more arguments; the remaining fu
 
 ```js
 const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args)));
-/*
+```
+
+```js
 const add5 = x => x + 5
 const multiply = (x, y) => x * y
 const multiplyAndAdd5 = compose(add5, multiply)
 multiplyAndAdd5(5, 2) -> 15
-*/
 ```