Latin Modern Asana TeX Gyre Pagella Neo Euler

We have $f\left(x\right)={\int }_{-\mathrm{\infty }}^{\mathrm{\infty }}\widehat{f}\left(\xi \right)e^{2\pi i\xi x}d\xi =\sum _{n=-\mathrm{\infty }}^{\mathrm{\infty }}{c}_n{e}^{2\pi i\left(n/T\right)x}$