Decompose

[Ignition]

How to decompose and resolve respect to x\frac{a}{b\pmx}?

[Ignition]

I would say a/b+x.

[HallsofIvy]

How to decompose and resolve respect to x\frac{a}{b\pm x}?
You need a space between "\pm" and "x". The way you have it, LaTex tries to find a command "\pmx" and since there isn't one, it shows nothing.
\frac{a}{b\pm x} means, of course, two values: \frac{a}{b+ x} and \frac{a}{b- x}. Now, what do you mean by "decompose with respect to x"? Neither of those fractions can be simplified more.