# Fourier Transformation l^2 - x^2

### Fourier Transformation l^2 - x^2

Hello, I need much help with this task. I have spent almost 3h working on it and still I do not know how to calculate it properly.

The task is: transform a function into Fourier

f(x) = $l^{2}$ - $x^{2}$ for < -l, l > and l > 0
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