data/mathematica-tex/292.tex
\left(\frac{a}{p}\right) = \begin{cases} 1 & \text{ if } a \text{ is a quadratic residue modulo } p \text{ and } a \not\equiv 0\pmod{p}, \\ -1 & \text{ if } a \text{ is a quadratic non-residue modulo } p, \\ 0 & \text{ if } a \equiv 0 \pmod{p}. \end{cases}