---
id: 5d792534857332d07ccba3ad
title: Step 27
challengeType: 0
dashedName: step-27
---
# --description--
Set `infix` to `/([0-9.]+)([+-])([0-9.]+)/` in `applyFn`.
# --hints--
See description above for instructions.
```js
assert(
code
.replace(/\s/g, '')
.includes(
'constapplyFn=str=>{constnoHigh=highPrecedence(str);constinfix=/([0-9.]+)([+-])([0-9.]+)/'
)
);
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```