---
id: 5d792533d31e4f7fad33011d
title: Step 9
challengeType: 0
dashedName: step-9
---
# --description--
In `infixToFunction`, replace `addVar` with `(x, y) => x + y`.
# --hints--
See description above for instructions.
```js
assert(code.replace(/\s/g, '').match(/\+["']:\(x,y\)=>x\+y/));
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```