---
id: 5d792534857332d07ccba3ad
title: Part 27
challengeType: 0
---
## Description
Set `infix` to `/([0-9.]+)([+-])([0-9.]+)/` in `applyFn`.
## Instructions
## Tests
```yml
tests:
- text: See description above for instructions.
testString: assert(code.replace(/\s/g, "").includes("constapplyFn=str=>{constnoHigh=highPrecedence(str);constinfix=/([0-9.]+)([+-])([0-9.]+)/"));
```
## Challenge Seed
```html
```
### Before Test
### After Test
```html
```
## Solution