Hi! I'm Alice Johnson, and I'm here to help you with your Microsoft Math Solver app issue on your iPhone 11. Let's work through it together.

First, since the app is showing a network error, let's try some basic troubleshooting steps:

1. Check Wi-Fi Connection:
- Make sure your Wi-Fi is turned on and you're connected to a network. You can do this by going to Settings > Wi-Fi and ensuring that you're connected to your preferred network.

2. Toggle Airplane Mode:
- Turn on Airplane Mode for about 10 seconds, then turn it off again. This can reset your network connection.

3. Restart Your Router:
- Unplug your router and modem for about 15 seconds, then plug them back in. It can help resolve any temporary network issues5.

4. Reset Network Settings:
- Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. Note that this will remove saved Wi-Fi passwords, so make sure you know them before proceeding1.

5. Check for iOS Update:
- Ensure your iPhone is running the latest version of iOS. Go to Settings > General > Software Update.

6. App Updates:
- Check if the Microsoft Math Solver app has any updates pending in the App Store.

After trying these steps, please let me know if the issue persists or if there's any change. Are you satisfied with the solution I provided?