updatedd

Author: Anshika14528

dsa-solutions/lc-solutions/0000-0099/0098-validate-binary-search-tree.md

@@ -40,7 +40,7 @@ Output: false
 ### Constraints
 
 - The number of nodes in the tree is in the range $[1, 10^4]$.
-- $-2^(31) <= Node.val <= 2^(31) - 1$.
+- $-2^{31} \leq \text{Node.val} \leq 2^{31} - 1$
 
 ### Approach