In order to make text flushed both left and right, latex adjusts the distance between words, and to a lesser extent, the distance between characters within a word. This is good, however it also adjusts the spacing within mathematical formulae. I don't like this feature - can I reduce its effect, or perhaps turn it off completely?
You would have to modify the length registers that allow for stretch/shrink around math operators/relations, namely
should work by stripping the glue. For more on math spacing around operators, see How to change default for spacing around binary relations?
Here's a small example:
As an alternative to resetting the parameters it is sometimes more convenient to box the expression so it is set to natural width, either with an explicit box, or within the math, just using
Note the math only stretched on the second row in this plain tex example.