fix formuls

neps/nep-0486.md

@@ -46,7 +46,7 @@ By using these functions, we can reproduce all functionality from EIP-2537[15].
 
 #### Elliptic Curve
 
-**Definition:** The field $F_p$ for some *prime* $p$ is a set of integer elements $\{0, 1, \ldots, p - 1\}$ with two operations: multiplication $\cdot$ and addition $+$. These operations are performed as multiplication/addition for integers number and then taking the remainder modulo $p$.
+**Definition:** The field $F_p$ for some *prime* $p$ is a set of integer elements $\textbraceleft 0, 1, \ldots, p - 1 \textbraceright$ with two operations: multiplication $\cdot$ and addition $+$. These operations are performed as multiplication/addition for integers number and then taking the remainder modulo $p$.