Calculation issues

[MillionsToOne]

Can't use addition, multiplication, division or caret on the answer without pressing substraction
A clear and concise description of what the bug is.

1. Make a calculation
2. Click on "="
3. Try to press anything of those mentioned above without pressing substraction
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Use multiply, division, addition and caret on answer without having to press substraction first
A clear and concise description of what you expected to happen.

https://drive.google.com/file/d/1_wZGUYNFRa5ItFszhFZ5gs2DVTdFBMao/view?usp=share_link
If applicable, add screenshots or videos to help explain your problem.

Smartphone (please complete the following information):

• Device: [Oneplus 8T]
• OS: [LineageOS based on Android]
• Version [LineageOS 20, Android 13]
• Language [English]

Additional context
Add any other context about the problem here.

[lefterisgar]

I pushed a change that probably fixes it. @Darkempire78 can you provide some feedback on whether it works or not?