Similar to `Math.min`

or `Math.max`

.

```
const total = Math.sum(22, 10, 106, -5); // 133
// same as doing
const total = 22 + 10 + 106 - 5;
```

**Use case:**

```
const items = [
{ name: 'a', amount: 2 },
{ name: 'b', amount: 3 }
];
const totalAmount = Math.sum(...items.map(function (item) {
return item.amount;
})); // 5
```

Could be called `Math.add()`

. Could also include other similar methods, like `Math.subtract()`

, `Math.multiply()`

, etc.

I think this can once and for all put the loathed `.reduce()`

to bed.