---
id: 5d7925357729e183a49498aa
title: Step 53
challengeType: 0
dashedName: step-53
---
# --description--
Create a new function `evalFormula` which takes a single argument, `x`. Set `/([A-J])([1-9][0-9]?):([A-J])([1-9][0-9]?)/gi` to a variable named `rangeRegex`.
# --hints--
See description above for instructions.
```js
assert(
code
.replace(/\s/g, '')
.includes(
'constevalFormula=x=>{constrangeRegex=/([A-J])([1-9][0-9]?):([A-J])([1-9][0-9]?)/gi'
)
);
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```