What is the integral of arg[f(x)]dx for x∈ℝ?

[epkid08]

I'd like to find the integral of this in terms of re(f(x)) and im(f(x)). Please show some steps, this is not homework.

\int arg[f(x)]dx x∈ℝ

 

[sutupidmath]

Pardone my ignorance, but can you just explain what re(f(x)) and im(f(x)) are,just so we will be on the same page, and thus avoid any possible confusion.