I want to get logical `(A - B)` or `(A \ B)` in google spreadsheets.

So, having:

**A:A**

```
{1,2,3,4}

```

and

**B:B**

```
{2,3,5,6}

```

[![enter image description here](https://i.stack.imgur.com/MEpSK.png)](https://i.stack.imgur.com/MEpSK.png)

So my formula

```
=my_amazing_formula(A:A, B:B)

```

should return

```
{1,4}

```

(Elements of A not being present in B)

**The question**

How can I achieve this?