Does this math formula with $1/PI\begin{cases}^\infty_{-\infty}\end{cases}$ mean anything?

It's safe to say that the math doesn't mean anything. No branch of mathematics or science or anything else uses the symbol $\{$ for an integral sign, and there are mismatched parentheses.


Googling fourier "a(y)" "b(y)" yields this first hit:

Fourier Integral of the function f(x)

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