I am a little annoyed with the inconsistency of the spacing of some math symbols like + and - when they appear to the left of a letter (or symbol) and when they appear between two letters (or symbols), as shown in the picture. Is there a reason for these spacing to be different? Is there any way to make them always equal without me having to do it manually every time they appear in the text?

Thanks.[![enter image description here](https://i.stack.imgur.com/mXdmh.png)](https://i.stack.imgur.com/mXdmh.png)