Need help with a Fourier series question

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I don't know if it's been asked before (if it has please give me the link), and I don't understand latex or anything so I'll write it in plain words: $$ f(x) = \begin{cases} x & \text{for } -\frac{\pi}{2} \leq x \leq \frac{\pi}{2} \\ π-x & \text{for } \frac{\pi}{2}< x \leq \frac{3π}{2} \end{cases} $$ Find the Fourier series. I feel like the function is odd so it should be simple but I keep messing it up.