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1-js/06-advanced-functions/05-function-object/5-sum-many-brackets/task.md

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+importance: 2
+
+---
+
+# Sum with an arbitrary amount of brackets
+
+Write function `sum` that would work like this:
+
+```js
+sum(1)(2) == 3; // 1 + 2
+sum(1)(2)(3) == 6; // 1 + 2 + 3
+sum(5)(-1)(2) == 6
+sum(6)(-1)(-2)(-3) == 0
+sum(0)(1)(2)(3)(4)(5) == 15
+```
+
+P.S. Hint: you may need to setup custom object to primitive conversion for your function.